Answers
Explanation:
It isn't clear what the elements of your flowchart are supposed to look like. In general, the proof would go like this:
1. List the "givens": PQ=6=TS; ∠P=120°=∠T; ∠PRQ and ∠TRS are vertical angles.
2. Note that the vertical angles are congruent
3. Claim ΔPRQ ≅ ΔTRS by the AAS congruence postulate since two corresponding adjacent angles and the corresponding sides not between them have been shown to be congruent.
Related Questions
Marie used one bag of flour.She baked two loaves of bread.Each loaf required 2 1/4 cups of flour.Then she used the remaining 6 1/2 cups of flour to make muffins.How much flour was in the bag to begin with
Answers
Final answer:
Marie used 4 1/2 cups of flour for the bread and had 6 1/2 cups left for the muffins. By adding these amounts together, we find that the original bag of flour contained 11 cups of flour in total.
Explanation:
To determine how much flour was initially in the bag, we need to add together the amount of flour used for the bread and the muffins.
Marie baked two loaves of bread, with each loaf requiring 2 1/4 cups of flour. Therefore, the total flour used for bread is:
2 loaves × 2 1/4 cups/loaf = 4 1/2 cups
After baking the bread, she used the remaining 6 1/2 cups of flour to make muffins. To find the initial amount of flour in the bag, we add the flour used for the bread to the flour used for the muffins:
4 1/2 cups + 6 1/2 cups = 11 cups
Therefore, the bag originally had 11 cups of flour.
PLEASE HELP!!! OFFERING LOTS!
Solve the system using substitution Verify the solution.
1. 3x-3=y
x+3y=11 2.
2. y=4-3x
5x+2y=5
3. -3x-1=y
-2x-y=-1
4. y=3x-2
-6x+3y=-4
Answers
Answer:
55 because if u take the 6 and 3 and multiply then subtract 4 and whatever you get that's your answer same with the others
Answer:
1. the answer is x=1/3y+1 y=3x−3
Step-by-step explanation:
A total of $114,000 will be evenly spent to build 12 Bungalows. If the first 5 bungalows have been completed and paid for, then __?__ is still available for the remaining bungalows.
Answers
Answer:
66500
Step-by-step explanation:
114000/12=9500 9500x7=66500114000:total budget
12:total bungalows
9500:budget for each bungalow
7: unfinished bungalows
66500: remaining budget for unfinished bungalows
hope this helped and good luck :D
The remaining budget for unfinished bungalows is $66500
What are arithmetical operations?The four basic arithmetic operations in Maths, for all real numbers, are: Addition (Finding the Sum; '+') Subtraction (Finding the difference; '-') Multiplication (Finding the product; '×') Division (Finding the quotient; '÷')
Given that, A total of $114,000 will be evenly spent to build 12 Bungalows, the first 5 bungalows have been completed and paid. We need to find the amount available for the remaining bungalows.
Amount used in each bungalow;
114000/12 = $9500
Therefore, each bungalow will need $9500
Amount used = $9500 × 5 = $47500
Amount remaining for remaining bungalows = $114,000 - $47500 = $66500
Hence, $66500 is remaining budget for unfinished bungalows.
For more references on arithmetical operations, click;
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Jerry is buying a new large screen television for his game room.He knows that the diagonal of the television measures 42.1 inches and the base is 34.3 inches.What is the area of the television (round to the nearest tenth)
Answers
Answer:
Step-by-step explanation:
The large screen television is rectangular in shape. The diagonal divides the rectangle into two equal right angle triangles. The diagonal represents the hypotenuse of the right angle triangle.
He knows that the diagonal of the television measures 42.1 inches and the base is 34.3 inches. To determine the height,h of the triangle which is also the width of the rectangle, we would apply Pythagoras theorem which is expressed as
Hypotenuse² = opposite side² + adjacent side²
42.1² = 34.3² + h²
h² = 1772.41 - 1176.49 = 595.92
h = √595.92 = 24.41 inches.
Area of rectangle = Length × width
Area of Television = 34.3 × 24.41 = 837.3 inches²
Tommy's heart aches and he needs a minor surgery to mend it. Before you sharpen your scalpel, you have to make sure that you operate on correct organ. Where is Tommy's hear
Answers
Answer:
The heart is located in the middle of the 2 lung's in the middle of the chest and slightly to the left side of the chest.
Step-by-step explanation:
The heart is a muscular organ of the size of a fist just behind and to the left of the breastbone. The cardiovascular system is the heart pumping blood across the artery and vein network.Behind your sternum and between your two lungs your heart is found. The heart lies closer to the front of the chest and in the front of the spine. Your diaphragm, stomach and liver are underneath your heart.
Hiros family lives 448 kilometers from the beach.Each of the 5 adults drove the family van an equal distance to get to and from the beach.How far did each adult drive?
Answers
Answer:
179.2km
Step-by-step explanation:
The distance from their house to the beach is 448km. Now they have to drive to and from the beach. The total distance traveled by the family is 448km + 448km.
This is equal to 896km. Now we have 5 adults who took their turns to drive and they drove the same distance. The total distance traveled by each adult will be 896/5 = 179.2km
Hence, each adult in the family drove a distance of 179.2km
Final total cost of making a triangular sale that has a base dimension of 12 feet and the height of 25 feet if the price for making the sale is $19.50 per square foot
Answers
Answer:
$2925
Step-by-step explanation:
To find the cost, we need to get the area of the triangular sale. This can be obtained by using the area of a triangle.
This is A = 1/2 * b * h
Where in this case, b = 12ft and h = 25ft
The area is thus 1/2 * 12 * 25 = 150sq.ft
Now we know that 1sq.ft is $19.50, 150 will be 150 * 19.5 = $2925
The cost of renting a car is $24.50 plus $11 per day. Sales tax is 7%. A car was rented for a total cost of $108.61. Which equation can be used to determine the number of days d the car was rented?
Answers
Answer:
Step-by-step explanation:
(24.50+11 d)*(107/100)=108.61
24.50×107+1177 d=10861
1177 d=10861-24.50×107
=10861-2621.50
=8239.50
d≈7 days
Final answer:
The equation that can be used to determine the number of days d the car was rented is: $108.61 = $24.50 + ($11 * Number of days). By solving this equation, we find that the car was rented for 7 days.
Explanation:
To determine the number of days the car was rented, we can use the equation:
Total cost = Cost of renting a car + (Cost per day * Number of days)
In this case, the cost of renting a car is $24.50 and the cost per day is $11. The sales tax is 7%.
The equation becomes:
$108.61 = $24.50 + ($11 * Number of days)
Now, we can solve for the number of days:
Subtract $24.50 from both sides of the equation: $108.61 - $24.50 = $11 * Number of days
Calculate the difference: $84.11 = $11 * Number of days
Divide both sides of the equation by $11: Number of days = $84.11 / $11
Round the result to the nearest whole number: Number of days = 7
sinusoidal wave in a string is described by the wave function y 5 0.150 sin (0.800x 2 50.0t) where x and y are in meters and t is in seconds. The mass per length of the string is 12.0 g/m. (a) Find the maximum transverse acceleration of an element of this string. (b) Determine the maximum transverse force on a 1.00-cm segment of the string . (c) State how the force found in part (b) compares with the tension in the string
Answers
Answer:
a) 375m/s2
b) F = 0.045N
c) F/T = 0.00096
d) Tension = 46.9N
Step-by-step explanation:
The step by step calculation is as shown in the attached file.
The legs of a right triangle are x and 15 while the hypotenuse is 17.
Which equation can be used to determine the value of x using the Pythagorean Theorem?
Answers
Answer:
Since the Option of equation are not given. Kindly chose any of the below equation from the answer to find the value of 'x'.
[tex]x^2+15^2=17^2[/tex]
[tex]x^2=17^2-15^2[/tex]
OR
[tex]x^2+225=289[/tex]
[tex]x^2=289-225[/tex]
Step-by-step explanation:
Given:
Length of One leg = x
Length of other Leg= 15
Hypotenuse = 17
We need to find the equation used to determine the value of x.
Solution:
Assuming Triangle to right angled triangle.
So we will apply Pythagoras theorem which sates that;
"The square of sum of two legs of right angle triangle is equal to square of the length of hypotenuse."
so we can say that;
[tex]x^2+15^2=17^2[/tex]
[tex]x^2=17^2-15^2[/tex]
OR
[tex]x^2+225=289[/tex]
[tex]x^2=289-225[/tex]
Since the equation are not given. Kindly chose any of the below equation from the answer to find the value of 'x'.
[tex]x^2+15^2=17^2[/tex]
[tex]x^2=17^2-15^2[/tex]
OR
[tex]x^2+225=289[/tex]
[tex]x^2=289-225[/tex]
Answer:
b
Step-by-step explanation:
How do I solve this? Please show steps clearly so i can understand, thank you
Answers
Answer:
The value of [tex]x=8[/tex].
Step-by-step explanation:
Given:
[tex]\frac{x+3}{x}-\frac{x+1}{x+4}=\frac{5}{x}[/tex]
We need to solve this equation.
Solution:
First combining equation having same denominators we get;
[tex]\frac{x+3}{x}-\frac{5}{x}=\frac{x+1}{x+4}[/tex]
Now denominators are common so we will solve the numerators we get;
[tex]\frac{x+3-5}{x}=\frac{x+1}{x+4}\\\\\frac{x-2}{x}=\frac{x+1}{x+4}[/tex]
Now by cross multiplication we get;
[tex](x-2)(x+4)=x(x+1)[/tex]
Now Applying distributive property we get;
[tex]x^2+4x-2x-8=x^2+x\\\\x^2+2x-8=x^2+x[/tex]
Now Combining the like terms we get;
[tex]x^2+2x-x^2-x=8\\\\x=8[/tex]
Hence on solving we get the value of [tex]x=8[/tex].
Given 10 < x + 12 Choose the solution set.
{x| x∈R, x > 2}
{x| x∈R, x < -2}
{x| x∈R, x > -2}
{x| x∈R, x < 2}
{x| x∈R, x > -4}
Answers
Answer:
{x| x∈R, x > -2}
Step-by-step explanation:
You solve the inequality just like you would solve an equality.
Everything that has the x on the left side, everything without x on the right side.
Be careful that when you multiply by -1, the inequality signal changes(for example, lesser than becomes higher than
So
[tex]10 < x + 12[/tex]
[tex]-x < 12 - 10[/tex]
[tex]-x < 2[/tex]
Multiplying by -1
[tex]x > -2[/tex]
So the correct answer is:
{x| x∈R, x > -2}
{x| x∈R, x > -2}
Step-by-step explanation:
You solve the inequality just like you would solve an equality.
Everything that has the x on the left side, everything without x on the right side.
Be careful that when you multiply by -1, the inequality signal changes(for example, lesser than becomes higher than
So
Multiplying by -1
So the correct answer is:
{x| x∈R, x > -2}
What is the distance between (-3, 2) and (3, -8)?
Answers
The distance between (-3, 2) and (3, -8) is approximately 11.66.
Explanation:To find the distance between two points, we can use the distance formula:
d = sqrt((x2 - x1)^2 + (y2 - y1)^2)
In this case, (-3, 2) can be denoted as (x1, y1) and (3, -8) can be denoted as (x2, y2). Substituting these values in the formula:
d = sqrt((3 - (-3))^2 + (-8 - 2)^2)
d = sqrt(6^2 + (-10)^2)
d = sqrt(36 + 100) = sqrt(136)
The distance between (-3, 2) and (3, -8) is approximately 11.66.
Final answer:
To calculate the distance between (-3, 2) and (3, -8), one must find the differences in both the x and y coordinates, square these differences, sum them, and take the square root of this sum, which yields approximately 11.66.
Explanation:
To find the distance between the points (-3, 2) and (3, -8), we use the Pythagorean Theorem. The distance d is calculated as the square root of the sum of the squares of the difference in the x-coordinates and the y-coordinates.
First, find the differences:
Δx = [tex]x_2 - x_1[/tex] = 3 - (-3) = 6
Δy = [tex]y_2 - y_1[/tex] = -8 - 2 = -10
Then calculate the distance squared:
d² = (Δx)² + (Δy)²
d² = (6)² + (-10)²
d² = 36 + 100
d² = 136
Take the square root of the distance squared to find the distance:
d = [tex]\sqrt{136}[/tex]
d ≈ 11.66
Kara is sorting buttons by lengths for a craft project.The line plot shows the length of each button.If Kara lines up all the 3/4-inche buttons,what would be the total length
Answers
Answer:
[tex]2\frac{1}{4} inches.[/tex]
Step-by-step explanation:
Hi,
We see the plot line below, which shows that three crosses above [tex]\frac{3}{4} - inch[/tex] buttons, that means we have three such buttons available with us.
To find their total lengths, we have two methods:
We can add the lengths of all buttons, that means add [tex]\frac{3}{4}[/tex] thriceOr simply multiply [tex]\frac{3}{4}[/tex] by three.[tex]\frac{3}{4} \times 3\\ = \frac{3 \times 3}{4}\\= \frac{9}{4}[/tex]
changing this improper fraction into a mixed fraction: [tex]2\frac{1}{4} inches.[/tex] will be the total length of three buttons lined up.
The bill for five glasses of apple juice and four salads is $9.50, but the bill for four glasses of apple juice and five salads is $10.30. What would be the bill for a glass of juice and a salad?
Answers
Answer: the bill for a glass of apple juice is $0.7 and the bill for a salad is $1.5
Step-by-step explanation:
Let x represent the bill for a glass of apple juice.
Let y represent the bill for a salad.
The bill for five glasses of apple juice and four salads is $9.50. It means that
5x + 4y = 9.5 - - - - - - - - - - - 1
The bill for four glasses of apple juice and five salads is $10.30. This means that
4x + 5y = 10.30- - - - - - - - - - - -2
Multiplying equation 1 by 4 and equation 2 by 5, it becomes
20x + 16y = 38
20x + 25y = 51.5
Subtracting, it becomes
- 9y = - 13.5
y = - 13.5/-9
y = 1.5
Substituting y = 1.5 into equation 1, it becomes
5x + 4 × 1.5 = 9.5
5x + 6 = 9.5
5x = 9.5 - 6 = 3.5
x = 3.5/5 = 0.7
The bill for a glass of juice and a salad would be $2.20.
Explanation:To find the cost of a glass of apple juice and a salad, we need to set up a system of equations using the given information. Let's assign variables to the cost of a glass of apple juice and a salad. Let x be the cost of a glass of apple juice and y be the cost of a salad.
From the first sentence, we can write the equation 5x + 4y = 9.50. From the second sentence, we can write the equation 4x + 5y = 10.30.
To solve this system of equations, we can use the method of substitution or elimination. Let's use the elimination method. Multiply the first equation by 4 and the second equation by 5 to eliminate x:
20x + 16y = 38.00
20x + 25y = 51.50
Subtract the first equation from the second:
9y = 13.50
Divide both sides by 9:
y = 1.50
Substitute this value of y into one of the original equations (let's use the first equation):
5x + 4(1.5) = 9.50
5x + 6 = 9.50
Subtract 6 from both sides:
5x = 3.50
Divide both sides by 5:
x = 0.70
Therefore, the bill for a glass of juice and a salad would be $0.70 + $1.50 = $2.20.
{(2,4),(3,5),(4,6),(5,8)}
Answers
Step-by-step explanation:
The given four sides of quadrilateral = (2, 4), (3, 5), (4, 6) and (5,8)
To find, the area of the quadrilateral = ?
We know that,
The area of quadrilateral [tex]=\dfrac{1}{2} [x_{1}( y_{2}-y_{3})+x_{2}( y_{3}-y_{4})+x_{3}( y_{4}-y_{1})+x_{4}( y_{1}-y_{2})][/tex]
[tex]=\dfrac{1}{2} [2( 5-6)+3( 6-8)+4( 8-4)+5(4-5)][/tex]
[tex]=\dfrac{1}{2} [2(-1)+3(-2)+4(4)+5(-1)][/tex]
[tex]=\dfrac{1}{2} (-2-6+16-5)[/tex]
[tex]=\dfrac{1}{2} (16-13)[/tex]
= [tex]\dfrac{3}{2}[/tex] units
Thus, the area of the quadrilateral is [tex]\dfrac{3}{2}[/tex] units.
PLEASE HELP PLEASE PLEASE DUE TONIGHT I HAVE NO IDEA HOW TO DO THIS
Answers
Answer:
I feel bad for you I really would like to help you but I haven't even learn that stuff yet
How many ounces of cinnamon is needed to bake cookies with 7 and 1/2 cups of flour if 1/3 ounce is cinnamon is needed for each 1 and 1/2 cups of flour?
Answers
Answer: 1 2/3 ounces of cinnamon is needed.
Step-by-step explanation:
1/3 ounce is cinnamon is needed for each 1 and 1/2 cups of flour. Converting 1 and 1/2 cups to improper fraction, it becomes 3/2 cups.
It means that the number of ounces of cinnamon need for 1 cup of flour would be
(1/3)/(3/2) = 1/3 × 2/3 = 2/9 ounces of cinnamon.
Converting 7 and 1/2 cups of flour to improper fraction, it becomes 15/2 cups of flour.
Therefore, the ounces of cinnamon needed to bake cookies with 15/2 cups of flour is
2/9 × 15/2 = 15/9 = 5/3
= 1 2/3 ounces of cinnamon
Tina and Joey share a 18-ounce box of cereal. By the end of the week, Tina has eaten 1 6 of the box, and Joey has eaten 2 3 of the box of cereal. How many ounces are left in the box?
Answers
Answer:The number of ounces of cereals left in the box is 3
Step-by-step explanation:
Tina and Joey share a 18-ounce box of cereal. By the end of the week, Tina has eaten 1/6 of the box. This means that the amount of cereal that Tina ate is
1/6 × 18 = 3 ounce
Also, by the end of the week, Joey has eaten 2/ 3 of the box of cereal. This that the amount of cereal that Joey ate is
2/3 × 18 = 12 ounce
The number of ounces of cereals left in the box would be
18 - (12 + 3) = 18 - 15
= 3
having trouble with this and 3 other problems
Answers
Answer:
a.) 10
b.) -2
c.) 6
d.) y = 6
e.) T = π
f.) y = -6cos(2t) + 4
Step-by-step explanation:
a.) Max value is the highest value in the y-axis. It peaks at y=10
b.) Min value is the lowest value in the y-axis. Peaks at y=-2
c.) Amplitude is how high the peak is from the midpoint. It could be found by taking the average of the peaks. (10 - (-2))/2 = 6
d.) y = 6
e.) T = π
f.) General equation for a sinusoidal wave is
y = Acos(ωt - Ф) + k
y = Acos((2π/T)t - Ф) + k
The graph started at it's min, so the amplitude must had been fliped upsidedown because it normally starts at the max. Therefore I must make my equation negative to flip it.
y = -Acos((2π/T)t - Ф) + k
A = amplitude = 6T = period = πФ = phaseshift = 0k = shift_in_y_direction = 4 , because shifting from -6 to -2 is shifting 4 units upy = -(6)cos((2π/(π))t - (0)) + (4)
y = -6cos(2t) + 4
As the former chair of the planning board for 18 consecutive years and a board member for 28 years, Joan Philkill attended more than 400 meetings and reviewed more than 700 rezoning applications.
(A) As the former
(B) The former
(C) Former
(D) She was
(E) As the
Answers
Answer:
Option E is the correct answer (As the)
Step-by-step explanation:
Option A indicates that Joan, for 18 years, was the former chair; it is inappropriate to think that she would be attending meetings while she was the former chair. The sentence indicates that Joan served for 18 years as the chair lady, and during this time she attended meetings. Thus, option E is clearer and precise in its meaning than option A.
On her plan, christina pays $5 just to place a call and $1 for each minute. When brenna makes an international call, she pays $1 to place the call and $5 for each minute. A call duration would cost exactly the same under both plans. What is the cost? What is the duration?
Answers
Answer:
$6 for a 1-minute call
Step-by-step explanation:
For duration "d" the costs of the plans are identical when ...
5 +1d = 1 +5d
4 = 4d . . . . . . . . add -1-1d to both sides
1 = d . . . . . . . . . divide by 4. Duration in minutes.
Then the cost for this 1-minute call is ...
5 + 1·1 = 6 . . . . dollars
Each plan will charge $6 for a 1-minute call.
Answer:
Step-by-step explanation:
Let x represent the call duration that would cost the same amount with either plans.
On her plan, christina pays $5 just to place a call and $1 for each minute. This means that the total cost of x minutes on this plan is
x + 5
When brenna makes an international call, she pays $1 to place the call and $5 for each minute. This means that the total cost of x minutes on this plan is
5x + 1
For both costs to be the same, the number of minutes would be
x + 5 = 5x + 1
5x - x = 5 - 1
4x = 4
x = 4/4 = 1
A call duration of 1 minute would cost exactly the same under both plans. The cost of the call would be
5 × 1 + 1 = $6
Jeanine owes $1,200 on a credit card. The cars charges 16% interest, compounded continuously. Write a formula that describes how much you knew on her card after t years, assuming she makes no payments and does not incur any additional charges.
Answers
The letter e is used for continuous compound, it is raised by the interest rate times the amount of time.
The formula would be 1200e^0.16t
The answer is C
Refer to Exercise 4. How many wooden signs can be painted with one gallon of paint? Between what two whole numbers does the answer lie?
Answers
Question refers to below content.
Three gallons of paint are used to paint 16 wooden signs. How many wooden signs can be painted with one gallon of paint?? Between what two whole numbers does the number lie?
Answer:
[tex]5 \frac{1}{3}[/tex] wooden sign can be painted from 1 gallon of paint.
The answer lies between number 5 and 6.
Step-by-step explanation:
Given:
Amount of paint = 3 gallons
Number of wooden signs = 16
We need to find the Number of wooden signs can be painted with 1 gallon of paint.
Solution:
Now we know that;
3 gallons of paint = 16 wooden signs painted
1 gallon of paint = Number of wooden signs can be painted with 1 gallon of paint.
By using Unitary method we get;
Number of wooden signs can be painted with 1 gallon of paint = [tex]\frac{16}{3} \ \ Or \ \ 5 \frac{1}{3}[/tex]
Hence [tex]5 \frac{1}{3}[/tex] wooden sign can be painted from 1 gallon of paint.
Now we can say that;
[tex]5 \frac{1}{3}[/tex] lies between 5 and 6.
Hence The answer lies between number 5 and 6.
If E(X)=100, E(Y)=120, E(Z) = 130, Var(X) = 9, Var(Y) = 16, Var(Z) = 25, Cov(X, Y)= - 10 Cov(X,Z) = 12, and Cov(Y,Z) = 14, then answer the followings: 1) Corr(X,Y) 2) Corr(X,Z) 3) Corr(Y,Z) 4) E(3X + 4Y – 3Z) 5) Var(3X – 3Z) 6) Var(3X + 4Y – 3Z) 7) Cov(3X, 2Y+3Z)
Answers
Answer:
(1) -0.833
(2) 0.80
(3) 0.70
(4) 390
(5) 90
(7) 48
Step-by-step explanation:
Given:
E (X) = 100, E (Y) = 120, E (Z) = 130
Var (X) = 9, Var (Y) = 16, Var (Z) = 25
Cov (X, Y) = -10, Cov (X, Z) = 12, Cov (Y, Z) = 14
The formulas used for correlation is:
[tex]Corr (A, B) = \frac{Cov (A, B)}{\sqrt{Var (A)\times Var(B)}} \\[/tex]
(1)
Compute the value of Corr (X, Y)-
[tex]Corr (X, Y) = \frac{Cov (X, Y)}{\sqrt{Var (X)\times Var(Y)}} \\=\frac{-10}{\sqrt{9\times16}} \\=-0.833[/tex]
(2)
Compute the value of Corr (X, Z)-
[tex]Corr (X, Z) = \frac{Cov (X, Z)}{\sqrt{Var (X)\times Var(Z)}} \\=\frac{12}{\sqrt{9\times25}} \\=0.80[/tex]
(3)
Compute the value of Corr (Y, Z)-
[tex]Corr (Y, Z) = \frac{Cov (Y, Z)}{\sqrt{Var (Y)\times Var(Z)}} \\=\frac{14}{\sqrt{16\times25}} \\=0.70[/tex]
(4)
Compute the value of E (3X+4Y-3Z)-
[tex]E(3X+4Y-3Z)=3E(X)+4E(Y)-3E(Z)\\=(3\times100)+(4\times120)-(3\times130)\\=390[/tex]
(5)
Compute the value of Var (3X-3Z)-
[tex]Var (3X-3Z)=[(3)^{2}\times Var(X)]+[(-3)^{2}\times Var (Z)]+(2\times3\times-3\times Cov(X, Z)]\\=(9\times9)+(9\times25)-(18\times12)\\=90[/tex]
(6)
Compute the value of Var (3X+4Y-3Z)-
[tex]Var (3X+4Y-3Z)=[(3)^{2}\times Var(X)]+[(4)^{2}\times Var(Y)]+[(-3)^{2}\times Var (Z)]+[(2\times3\times4\times Cov(X, Y)]+[(2\times3\times-3\times Cov(X, Z)]+[(2\times4\times-3\times Cov(Y, Z)]\\=(9\times9)+(16\times16)+(9\times25)+(24\times-10)-(18\times12)-(24\times14)\\=-230[/tex]
But this is not possible as variance is a square of terms.
(7)
Compute the value of Cov (3X, 2Y+3Z)-
[tex]Cov(3X, 2Y+3Z)=Cov(3X,2Y)+Cov(3X, 3Z)\\=6Cov(X, Y)+9Cov(X,Z)\\=(6\times-10)+(9\times12)\\=48[/tex]
The correct answers to the given set of data are:
(1) -0.8332) 0.80(3) 0.70(4) 390(5) 90(7) 48What is Variance?This refers to the measurement of spread between numbers which can be found in a set of data.
Hence, to compute the variance and covariance
E (X) = 100, E (Y) = 120, E (Z) = 130Var (X) = 9, Var (Y) = 16, Var (Z) = 25Cov (X, Y) = -10, Cov (X, Z) = 12, Cov (Y, Z) = 14Using the variance formula we can see that the given sets of data are:
-0.8330.800.703909048 respectivelyRead more about variance here:
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You can work a total of no more than 10 hours each week at your two jobs. Your house cleaning job pays $5. per hour and your sales job pays $8 per hours. You need to earn at least $56 each week to pay your bills.
Define your variables and write a system of inequalities that shows the number of hours you can work at each job.
Answers
System of inequalities are, [tex]x+y<10[/tex] and [tex]5x+8y\geq 56[/tex]
Let us consider, He does house cleaning job for x hours and sales job for y hours.
Since, he can work a total of not more than 10 hours each week at two jobs.
So, inequality are, [tex]x+y<10[/tex]
Since, house cleaning job pays $5. per hour and sales job pays $8 per hours.
Thus, Total earn = 5x + 8y
But he need to earn at least $56 each week
So, inequality are , [tex]5x+8y\geq 56[/tex]
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Final answer:
The variables x and y represent the hours worked at the house cleaning and sales jobs, respectively. The system of inequalities x + y ≤ 10, 5x + 8y ≥ 56, and x ≥ 0, y ≥ 0 reflects the constraints on work hours and minimum earnings.
Explanation:
To solve the problem, we need to define two variables representing the hours worked at each job:
Let x be the number of hours worked at the house cleaning job.
Let y be the number of hours worked at the sales job.
Given the conditions of the problem, we can formulate the following system of inequalities:
The total working hours from both jobs cannot exceed 10 hours per week: x + y ≤ 10.
The total earnings must be at least $56 to pay bills: 5x + 8y ≥ 56.
The number of working hours cannot be negative: x ≥ 0 and y ≥ 0.
This system of inequalities represents the constraints on the number of hours you can work at each job and the minimum earnings required to pay your bills.
Suppose that the height(In centimeters) Of a candle is a linear function of time (in hours) it has been burning. After seven hours of burning, a candle has high of 22.5 Centimeters. After 26 hours of burning, it's high is 13 cm. What is the height of the candle after 10 hours
Answers
Answer: the height after 10 hours is 21 cm
Step-by-step explanation:
Assuming the rate at which the height of the candle is decreasing is in arithmetic progression. The formula for determining the nth term of an arithmetic sequence is expressed as
Tn = a + (n - 1)d
Where
a represents the first term of the sequence.
d represents the common difference.
n represents the number of terms in the sequence.
If after seven hours of burning, a candle has high of 22.5 Centimeters, the expression is
22.5 = a + (7 - 1)d
22.5 = a + 6d - - - - - - - - - -1
If after 26 hours of burning, it's height is 13 cm. The expression is
13 = a + (26 - 1)d
13 = a + 25d - - - - - - - - - - - 2
9.5 = - 19d
d = 9.5/ - 19
d = - 0.5
Substituting d = - 0.5 into equation 1, it becomes
22.5 = a + 6 × - 0.5
22.5 = a - 3
a = 22.5 + 3
a = 25.5
The linear expression becomes
Tn = 25.5 - 0.5(n - 1)
The height of the candle after 10 hours would be
25.5 - 0.5(10 - 1)
= 25.5 - 4.5
= 21 centimeters
Ray Bond sells handcrafted yard decorations at county fairs. The variable cost to make these is $20 each, and he sells them for $50. The cost to rent a booth at the fair is $150. How many of these must Ray sell to break even?
Ray Bond is trying to find a new supplier that will reduce his variable cost of production to $15 per unit. If he was able to succeed in reducing this cost, what would the break-even point be?
Answers
Answer:
break even units for both the cases will be 5
Step-by-step explanation:
Data provided in the question:
For the case 1
Variable cost = $20 each
Selling cost = $50
Rent for the booth fair = $150
Now,
Let break even units be x
At break even
Total cost = Total revenue
Thus,
$20x + $150 = $50x
or
$50x - $20x = $150
or
$30x = $150
or
x = 5
Case 2
Variable cost = $15 per unit
Thus,
At break even
Total cost = Total revenue
Thus,
$15x + $150 = $50x
or
$50x - $15x = $150
or
$35x = $150
or
x = 4.28 ≈ 5
The break even point will still remain the same.
The break-even point is calculated by setting total cost equal to total revenue and solving for the number of units produced and sold (denoted as 'units').
Given the current variable cost per unit ($20), the sale price per unit ($50), and the fixed cost (booth rent - $150), we can set up the equation as follows:
Total Cost = Fixed cost (booth rent) + variable cost per unit * units
Total Revenue = sale price per unit * units
Setting these two equal to each other, we get:
150 + 20*units = 50*units
By rearranging this equation, we find:
units = 150 / (50 - 20)
This calculates out to 5 units. Therefore, Ray needs to sell 5 units to break even with his current costs.
If Ray is able to reduce his variable cost to $15 per unit, we will repeat the same calculation with the new variable cost:
units = 150 / (50 - 15)
This calculates out to approximately 4.29 units. Since Ray cannot sell a fraction of a unit, he would have to sell 5 units to fully cover his costs, but he would begin to make a profit sooner than with his current variable cost. In fact, from the 5th unit sold, part of the revenue would go towards profit. Therefore, with the reduced variable cost, his break-even point would be closer to 4 units, but practically still 5 units.
In conclusion, with his current costs, Ray's break-even point is at 5 units. If he is able to reduce his variable cost to $15 per unit, his break-even point would theoretically be lower at approximately 4.29 units, but practically still would round up to 5 units.
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Solve. x+ y = 3 y = x-7 Use the substitution method. The solution is (5, −2). There is no solution. The solution is (8, 1). There are an infinite number of solutions.
Answers
Answer:
The solution is (5, −2)
Step-by-step explanation :
x + y = 3 => y = 3 - x
y = x - 7 } =>
=> 3 - x = x - 7 => 3 + 7 = x + x => 2x = 10 => x = 5
x + y = 3
5 + y = 3
y = 3 - 5
y = - 2
Davis is putting tile in his rectangular kitchen. His kitchen is 13 feet long, and 17 feet wide. The tile davis is installing is $3.75 per square foot. How much will it cost davis
Answers
Answer:
It will cost is $828.75.
Step-by-step explanation:
Given:
Davis is putting tile in his rectangular kitchen. His kitchen is 13 feet long, and 17 feet wide. The tile davis is installing is $3.75 per square foot.
Now, to find the total cost.
Davis is putting tile in his rectangular kitchen.
Length = 13 feet.
Width = 17 feet.
So, to get the area of kitchen:
Area = length × width
Area = 13 × 17
Area = 221 square foot.
As, the unit rate is given.
Cost per square foot = $3.75.
Now, to get the total cost by using unitary method:
If cost of 1 square foot = $3.75.
So, the cost of 221 square foot = $3.75 × 221
= $828.75.
Therefore, it will cost $828.75.
To find the total cost of tiling Davis' kitchen, we need to find the area of the kitchen in square feet by multiplying its length and width, then multiply the area by the cost per square foot. In this case, it will cost Davis $828.75 to tile his kitchen.
Explanation:The question is about Davis installing tiles in his rectangular kitchen and how much the cost will be at $3.75 per square foot. First, we need to determine the total area of the kitchen. In this case, the kitchen is rectangular in shape and the area of a rectangle is calculated by multiplying the length by the width. Here, length is 13 feet and the width is 17 feet, hence the area of the kitchen is 13 x 17 = 221 square feet.
Now, the cost per square foot of tile is given as $3.75. So, we multiply the total area by the cost per square foot to determine the overall cost of the tile. The calculation is as follows, 221 square feet x $3.75 = $828.75.
Therefore, it will cost Davis $828.75 to tile his kitchen.
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