Answer:
It is proved that AB = 2 × DE.
Step-by-step explanation:
The three vertices of triangle ABC are A(-2,6), B(8,-2) and C(-8,-4).
So, the mid point of AC (say D) has coordinates [tex](\frac{- 2 - 8}{2},\frac{6 - 4}{2}) = (-5,1)[/tex].
And the mid point of BC (say E) has coordinates [tex](\frac{8 - 8}{2}, \frac{- 2 - 4}{2}) = (0, - 3)[/tex].
Now, the length of DE will be [tex]\sqrt{(- 5 - 0)^{2} + (1 + 3)^{2}} = \sqrt{41}[/tex] units.
Again, the length of AB will be [tex]\sqrt{(- 2 - 8)^{2} + (6 + 2)^{2}} = 2\sqrt{41}[/tex] units.
So, it is proved that AB = 2 × DE. (Answer)
John is 3 years younger than twice Monica's age. If m represents Monica's age, which equation can be used to find j, John's age?
A. j = 2m-3
B. m = 2j-3
C. j = 3-2m
D. m = 3-2
Answer:
J =2m -3
Step-by-step explanation:
2m is twice Monica's age
-3 represents 3 years younger
The ratio of men to women working for a company is 4 to 7. If there are 105 women working for the company, what is the total number of employees? (Help please)
Answer:
165 people
Step-by-step explanation:
If there are 105 woman then there are going to be 60 men because 105/7=14, so you multiply 4*15 and get 60. 60 + 105= 165. So the total employees will be 165.
The total number of employees is the sum of men and women, which is 105 (women) + 60 (men) = 165 employees.
To find the total number of employees, calculate the number of men from the given ratio 4:7 and the number of women (105), and then add the number of men to the number of women to get the total.
The question is about finding the total number of employees in a company given the ratio of men to women and the number of women.
Let's use the provided ratio of men to women, which is 4 to 7, to calculate the number of men.
Since there are 105 women, and the ratio dictates that for every 7 women there are 4 men, we divide 105 by 7 to find the number of units that represent women, which is 15.
We then multiply this by 4 (the number of men) to find the number of men, which is 60.
105 + 60 = 165
question and answer choices in the attachment
The additive inverse is the idea of adding a negative number, which is the same as subtraction. Example: 2 + (-3) = 2-3
Based on the example above, if we start off with 3 and add on its additive inverse -3, then 3 + (-3) = 3-3 = 0. In general, x + (-x) = x-x = 0. So adding any number with its additive inverse gets you 0 every time.
-----------------------------------------------
Extra info:
Choice A is ruled out because the commutative property of multiplication is the idea that we can multiply two numbers in any order we want. Eg: 7*8 = 56 and 8*7 = 56, so 7*8 = 8*7Choice B is ruled out as well. The commutative property of addition is similar to the rule mentioned in choice A. But now we're adding. This rule says we can add two numbers in any order. Eg: 4+5 = 5+4 = 9Choice D is ruled out also. The multiplicative inverse of x is 1/x. Multiplying the two together gets you 1. Keep in mind that x cannot be zero. Example: The multiplicative inverse of 99 is 1/99, since 99*(1/99) = 99/99 = 1.solve 3+4n/n = 7b for n
To solve the equation 3 + 4n/n = 7b for n, you can cancel out the n in the numerator and denominator. Then, subtract 3 from both sides of the equation and divide by 7 to solve for b.
Explanation:To solve the equation 3 + 4n/n = 7b for n, we need to isolate n on one side of the equation. First, we can simplify the equation by canceling out the n in the numerator and denominator, as they are dividing each other. This leaves us with 3 + 4 = 7b. Next, we can subtract 3 from both sides of the equation to get 4 = 7b - 3. Finally, we can divide both sides of the equation by 7 to solve for b: 4/7 = b.
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Jonathan has $44,200 in a saving account. The interest rate is 7% per year and is not compounded. How much interest will he earn in 3 years?
The interest that he gains after 3 years is $9282.
Step-by-step explanation:
Step 1: Given details are Principal amount (P) in bank = $44200, Interest rate, R = 7%, Time, T = 3 years. Since interest is not compounded, we have to calculate simple interest.Step 2: Formula for Simple Interest (SI) = PRT/100⇒ SI = (44200 × 7 × 3)/100
⇒ SI = 442 × 7 × 3
⇒ SI = $9282
What is the remainder when x^6-4x^4+4x^2-10 is divided by x+3
How do you find the percent increase from 120 to 144
Answer:
20%
Step-by-step explanation:
If 120 = 100%
144 = x
By cross multiplication,
120x = 144 * 100
120x = 14400
x = 14400/120
x = 120%
The percentage increase is 20%
Let f(x)=2x^2+3x-15 and g(x)=x-1. Perform the function operation and then find the domain.
(F+G)(X)=
Answer:
[tex](F+G)x=2x^2+4x-16[/tex]
[tex]Domain[/tex] [tex]=(-\infty,\infty)[/tex]
Step-by-step explanation:
Given that
[tex]F(x)=2x^2+3x-15[/tex]
and [tex]G(x)=x-1[/tex]
then [tex](F+G)x = F(x)+G(x)[/tex]
[tex]=(2x^2+3x-15)+(x-1)\\=2x^2+3x-15+x-1\\\\(F+G)x=2x^2+4x-16[/tex]
Domain
since it is a polynomial of degree [tex]2[/tex], the domain will be whole real line
[tex]domain[/tex] [tex]=(-\infty,\infty)[/tex]
Final answer:
To perform the function operation (F+G)(X), add the functions f(x) and g(x) together to get (F+G)(X) = 2x² + 4x - 16. The domain of this function is all real numbers.
Explanation:
To perform the function operation (F+G)(X), where f(x) is given as 2x² + 3x - 15 and g(x) is x - 1, we simply add the two functions together:
(F+G)(X) = f(x) + g(x)
(F+G)(X) = (2x² + 3x - 15) + (x - 1)
This simplifies to:
(F+G)(X) = 2x² + (3x + x) - (15 + 1)
(F+G)(X) = 2x² + 4x - 16
The domain for this new function is all real numbers, since there are no restrictions such as division by zero or taking the square root of a negative number that would limit the values that x can take.
Translate "the product of z,x,and y into a mathematical expression
Answer:
Step-by-step explanation:
zxy or xyz or z×x×y
Final answer:
The mathematical expression for 'the product of z, x, and y' is simply 'zxy' or 'z times x times y', which indicates that the three variables are being multiplied together to form a product.
Explanation:
To translate "the product of z, x, and y" into a mathematical expression, we represent multiplication using either the multiplication sign (times) or simply by juxtaposition (placing the variables next to each other). Thus, the product of the variables z, x, and y is represented as z imes x imes y or simply as zxy. This expression shows that z, x, and y are being multiplied together to give a Mathematical Result.
In mathematics, when expressions are evaluated and produce the same value, they are known as equivalent expressions. For example, the expression (5 - 3xy) is evaluated by following the order of operations, which in this case involves subtracting the product of 3 and xy from 5. If x, y, and z are treated as three independent variables, it is also possible to represent their product in the form of a Multiple or Product, like so: xyz.
A 100 ft. ladder rests on top of a hook and ladder truck with its base 11 feet from the ground
Answer:
Its 111ft. tall if thats what your asking.
Step-by-step explanation:
100+11=111
The answer is: [tex]83.66^\circ[/tex]. The angle of elevation that the ladder makes with the ground is approximately [tex]\( 83.66^\circ \)[/tex].
To solve the problem, we need to find the angle of elevation that the ladder makes with the ground when it is resting on top of the hook and ladder truck. We are given that the ladder is 100 feet long and its base is 11 feet from the ground.
We can use trigonometry to solve for the angle of elevation (θ). The tangent of the angle of elevation is the ratio of the opposite side (height from the ground to the top of the ladder) to the adjacent side (the distance from the base of the ladder to the point on the ground directly below the top of the ladder).
Let's denote:
- The length of the ladder as [tex]\( L \)[/tex], which is 100 feet.
- The distance from the base of the ladder to the point on the ground directly below the top of the ladder as [tex]\( d \)[/tex], which is 11 feet.
- The height from the ground to the top of the ladder as [tex]\( h \)[/tex].
Using the Pythagorean theorem, we can find [tex]\( h \)[/tex]:
[tex]\[ h^2 + d^2 = L^2 \][/tex]
[tex]\[ h^2 + 11^2 = 100^2 \][/tex]
[tex]\[ h^2 = 100^2 - 11^2 \][/tex]
[tex]\[ h^2 = 10000 - 121 \][/tex]
[tex]\[ h^2 = 9879 \][/tex]
[tex]\[ h = \sqrt{9879} \][/tex]
[tex]\[ h \approx 99.39 \text{ feet} \][/tex]
Now, we can find the angle of elevation using the tangent function:
[tex]\[ \tan(\theta) = \frac{h}{d} \][/tex]
[tex]\[ \theta = \arctan\left(\frac{h}{d}\right) \][/tex]
[tex]\[ \theta = \arctan\left(\frac{99.39}{11}\right) \][/tex]
[tex]\[ \theta \approx \arctan(9.03545455) \][/tex]
[tex]\[ \theta \approx 83.66^\circ \][/tex]
Therefore, the angle of elevation that the ladder makes with the ground is approximately [tex]\( 83.66^\circ \)[/tex].
The final answer is:
[tex]\[ \boxed{83.66^\circ} \][/tex]
The complete question is:
A 100 ft ladder rests on top of a hook and ladder truck with its base 11 feet from the ground. When the angle of elevation of the ladder is 81°, how high up the building will the ladder reach?
seven and two hundred sixty-seven ten thousandths as a decimal
7.0267
Step-by-step explanation:
The clue here is that the decimal point follows after the "and"
For example,
One and one thousandth = 1 + 1/1000 = 1.001
One and two hundred sixty-three thousandths = 1+ 263/1000 = 1.263
Hence;
seven and two hundred sixty-seven ten thousandths= 7+ 267/10000= 7.0267
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The formula below is used to convert a temperature in degrees Celsius,C, to a
temperature in degrees Fahrenheit, F.
F= 1.8C + 32
on temperature in a mountain city was 15°C. What was the high temperature in
degrees Fahrenheit?
Answer:
is
47 degree fahrenheit
The high temperature in degrees Fahrenheit was [tex]\( 59^\circ \)[/tex] Fahrenheit.
To convert a temperature from Celsius to Fahrenheit using the formula F = 1.8C + 32, where F is the temperature in Fahrenheit and C is the temperature in Celsius, you simply plug in the value of C and solve for F.
Given that the high temperature in the mountain city was [tex]\( 15^\circ \)[/tex] Celsius, we can plug this value into the formula:
F = 1.8 * 15 + 32
F = 27 + 32
F = 59
So, the high temperature in degrees Fahrenheit was [tex]\( 59^\circ \)[/tex]Fahrenheit.
9/11 times 7/10 simplified
The table below shows the scores on a math test.
Which graph shows the correct visual displays?
Answer:
A.)
Step-by-step explanation:
It has the best graph that matches the table
The Y-axis is the number of students who got that grade
The X-axis is the number grade
How do I find the value of X for the equation (3x+1)+(4x-5)=8x-9
To solve the equation (3x+1)+(4x-5)=8x-9, we simplify and solve for x, obtaining x=5 as the solution. Verification by substitution confirms that our solution is correct.
Explanation:To find the value of X for the equation (3x+1)+(4x-5)=8x-9, we first simplify both sides of the equation by combining like terms. On the left side, we combine the x terms and the constant terms: 3x + 4x + 1 - 5. This simplifies to 7x - 4. The right side of the equation remains as 8x - 9.
Next, we set the simplified left side of the equation equal to the right side: 7x - 4 = 8x - 9. To solve for x, we can subtract 7x from both sides to get x on one side of the equation, resulting in -4 = x - 9. Adding 9 to both sides gives us x = 5 as the solution.
To verify, we substitute x=5 back into the original equation: (3(5)+1)+(4(5)-5) = 15 + 1 + 20 - 5 = 31, and on the right side, 8(5) - 9 = 40 - 9 = 31, which confirms our solution since both sides equal 31.
Write a real world problem you could answer by solving the equation -8+60=28
"Mitchael owes $8 to his bank, so he decides to add $60 in April at a rate of $2 per day. How many days Mitchael needs in order to get $28 in his account?"
Explanation:Hello! Remember you have to write clear questions in order to get good and exact answers. The given equation doesn't make any sense so I'll assume the correct one is:
[tex]-8+60x=28[/tex]
So let's write a real world problem you could answer by solving the equation:
"Mitchael owes $8 to his bank, so he decides to add $60 in April at a rate of $2 per day. How many days Mitchael needs in order to get $28 in his account?"
So by isolating x (number of months):
[tex]x=\frac{28+8}{60} \\ \\ x=0.6 \ month \\ \\ \\ Since \ we \ need \ the \ number \ of \ days: \\ \\ April \ has \ 30 \ days, \ so: \\ \\ x-day=0.6\times 30=18 \ days[/tex]
So Mitchael would need 18 days in order to get $28 in his account
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To solve the equation -8+60=28, we follow basic arithmetic by adding the positive payment to the negative debt which gives us 52. This answer indicates an error in the original problem statement, as the expected balance does not match with the calculated one.
A real-world problem that could be answered by solving the equation -8+60=28 might involve a scenario where someone is tracking their financial transactions. Suppose you start with a debt of \(-8 dollars and then receive 60 dollars as a payment of some sort. The question could be to determine how much money you have after receiving the payment. To find out, you would solve the equation to see if your final balance is 28 dollars as expected.
Let's solve this step-by-step:
Add the amount received to the initial debt: \( -8 + 60 \).
Calculate the sum which gives us \( 52 \).
Therefore, after receiving the payment, you have 52 dollars.
To answer the original equation, the final balance should be 28 dollars; however, the solution we found is 52 dollars, indicating there might be a mistake in the original problem statement or the transactions recorded.
Find the slope for the following pair of points:
(10,4) and (-2, 17)
Final answer:
The slope of the line passing through the points (10,4) and (-2, 17) is calculated using the slope formula and is approximately -1.08.
Explanation:
To find the slope for the line passing through the two points (10,4) and (-2, 17), we use the slope formula which is (change in y)/(change in x) or (y2 - y1) / (x2 - x1). Applying this formula to our points:
m = (17 - 4) / (-2 - 10)
m = 13 / -12
m = -1.0833...
So, the slope of the line that passes through the points (10,4) and (-2, 17) is approximately -1.08.
Evaluate each expression 28-c3+6
Answer:
28-c3+6=0
Collect like terms
28-6=c3
22=c3
Divide both sides by 3
22/3=c3/3
C=7
To evaluate the expression 28-c3+6, you must know the value of 'c'. Assuming c3 means c cubed, then you would calculate 'c' cubed, subtract it from 28 and then add 6. Without a value for 'c', we cannot compute a definitive answer.
Explanation:To solve this mathematical expression, we must first understand what c3 means. In this case, 'c' and '3' are variables and without a given value for 'c' we cannot fully evaluate it. However, if we assume that 'c3' means 'c' cubed then, we can proceed with that understanding. Cubing a number means multiplying it by itself twice. For example, if c=2, then c cubed would be 2*2*2=8.
Next step is to follow the rules of the order of operations, often remembered by the acronym PEMDAS - Parentheses, Exponents, Multiplications and Divisions (from left to right), Additions and Subtractions (from left to right).
Therefore, given the expression 28-c3+6, you would first calculate 'c' cubed and then perform the remaining operations from left to right. If 'c' was 2, your expression would look like this: 28-8+6. Following PEMDAS, subtraction comes before addition, so you subtract 8 from 28 which is 20 and then add 6 to that, giving a result of 26. But remember, without knowing the true value of 'c', we cannot definitively solve the expression.
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a syrup is made by dissolving 2 cups of sugar to 2/3 cups of boiling water. how many cups of sugar should be used for 2 cups of boiling water
Answer:
6 cups
Step-by-step explanation:
did the math
For two cups of boiling water, 6 cups of sugar would be needed
The first step is to determine how many cups of sugar that would be needed for one cup of boiling water
The number of cups of sugar needed for a cup of boiling water = cups of sugar / cups of boiling water
2 ÷ [tex]\frac{2}{3}[/tex]
2 x [tex]\frac{3}{2}[/tex] = 3 cups
The second step is to determine the number of cups of sugar that would be needed with two cups of boiling water
Cups of sugar needed for 2 cups of water = cups of sugar needed for one cups of boiling water x 2
3 cups x 2 cups = 6 cups
In order to determine the cups of sugar needed for two cups of boiling water, first determine the number of cups of sugar needed for a cup of boiling water. Use the figure determined to find the cups of sugar needed for 2 cups of water
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What is the value of x?
What is 825 kilograms in grams
Answer:825000
Step-by-step explanation:
Answer:825000
Step-by-step explanation:
825*1000
What is true about the solution of StartFraction x squared Over 2 x minus 6 EndFraction = StartFraction 9 Over 6 x minus 18 EndFraction?
x = plus-or-minus StartRoot 3 EndRoot, and they are actual solutions.
x = plus-or-minus StartRoot 3 EndRoot, but they are extraneous solutions.
x = 3, and it is an actual solution.
x = 3, but it is an extraneous solution.
Answer:
[tex]x=\pm\sqrt{3}[/tex] and they are actual solutions
Step-by-step explanation:
we have
[tex]\frac{x^2}{2x-6}=\frac{9}{6x-18}[/tex]
Factor the denominators both sides
[tex]\frac{x^2}{2(x-3)}=\frac{9}{6(x-3)}[/tex]
Simplify
[tex]\frac{x^2}{2}=\frac{9}{6}[/tex]
[tex]x^2=\frac{18}{6}[/tex]
[tex]x=\pm\sqrt{3}[/tex]
Verify
1) For [tex]x=\sqrt{3}[/tex]
[tex]\frac{\sqrt{3}^2}{2(\sqrt{3}-3)}=\frac{9}{6(\sqrt{3}-3)}[/tex]
[tex]\frac{3}{2(\sqrt{3}-3)}=\frac{9}{6(\sqrt{3}-3)}[/tex]
[tex]18=18[/tex] ---> is true
therefore
[tex]x=\sqrt{3}[/tex] ----> is an actual solution
2) For [tex]x=-\sqrt{3}[/tex]
[tex]\frac{-\sqrt{3}^2}{2(-\sqrt{3}-3)}=\frac{9}{6(-\sqrt{3}-3)}[/tex]
[tex]\frac{3}{2(-\sqrt{3}-3)}=\frac{9}{6(-\sqrt{3}-3)}[/tex]
[tex]18=18[/tex] ---> is true
therefore
[tex]x=-\sqrt{3}[/tex] ----> is an actual solution
therefore
Answer:
The answer is A!
Step-by-step explanation:
Mr.woo wants to ship a fishing rod that is 42 inches long to his son.He has a box with the dimension shown.will the fishing rod fit
The 42 inches fishing rod is fit into the box.
Explanation:
Length of the box = 40 inch
Width of the box = 10 inch
Height of the box = 10 inch
Let us first find the diagonal of the base of the box and 'd' be the diagonal.
Diagonal formula:
[tex]d^2=l^2+w^2[/tex]
[tex]=40^2+10^2[/tex]
[tex]=1600+100[/tex]
[tex]d^2=1700[/tex]
Let r be the length from a bottom corner to the opposite top corner.
To find r:
Using Pythagoras theorem,
[tex]r^2=s^2+h^2[/tex]
[tex]=1700+10^2[/tex]
[tex]=1700+100[/tex]
[tex]r^2=1800[/tex]
Taking square root on both side of the equation,
[tex]r=\sqrt{1800}[/tex]
r ≈ 42.43 inch
The length of the longest tube that will fit in the box is 42.43 inches.
Hence the 42 inches fishing rod is fit into the box.
To determine if the fishing rod will fit, compare the length of the fishing rod to the length of the box and check the other dimensions for a comfortable fit.
Explanation:To determine if the fishing rod will fit inside the box, we need to compare the length of the fishing rod to the dimensions of the box. Since the fishing rod is 42 inches long, we need to check if 42 inches is less than or equal to the length of the box. If it is, then the fishing rod will fit.
Step 1: Compare the length of the fishing rod (42 inches) to the length of the box. If 42 inches is less than or equal to the length of the box, go to Step 2. Otherwise, the fishing rod will not fit.
Step 2: Check the other dimensions of the box to ensure that the fishing rod can fit without any issues. If the fishing rod can fit comfortably inside the box, then it will fit.
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Need help understanding how to work these math problems
Answer:
1. B. x = 11
2. E. [tex]m\angle BEF=140^{\circ}[/tex]
3. D. 4.3 in
4. D. 40.8 ft
Step-by-step explanation:
1. By Angle Addition Postulate,
[tex]m\angle KLM=m\angle KLV+m\angle VLM[/tex]
Since
[tex]m\angle KLV=34^{\circ}\\ \\m\angle KLM=14x+19\\ \\m\angle VLM=12x+7,[/tex]
then
[tex]14x+19=34+12x+7\\ \\14x-12x=34+7-19\\ \\2x=22\\ \\x=11[/tex]
2. By Angle Addition Postulate,
[tex]m\angle FED=m\angle DEB+m\angle BEF[/tex]
Since
[tex]m\angle FED=14x+8\\ \\m\angle DEB=22^{\circ}\\ \\m\angle BEF=13x-3,[/tex]
then
[tex]14x+8=22+13x-3\\ \\14x-13x=22-3-8\\ \\x=11[/tex]
Therefore,
[tex]m\angle BEF=(13\cdot 11-3)^{\circ}=(143-3)^{\circ}=140^{\circ}[/tex]
3. The area of trapezoid is
[tex]A_{trapezoid}=\text{Midsegment}\times \text{Height}[/tex]
From the diagram,
[tex]\text{Smaller base}=1.2\ in\\ \\\text{Bigger base}=4.2\ in,[/tex]
then
[tex]\text{Midsegment}=\dfrac{1.2+4.2}{2}=2.7\ in[/tex]
Since the area of trapezoid is [tex]11.6\ in^2,[/tex] then
[tex]11.6\ in^2 =2.7\ in\times \text{Height}\\ \\\text{Height}=\dfrac{11.6\ in^2}{2.7\ in}\approx 4.3\ in[/tex]
4. Use formula for the area of the circle to find the radius of the circle:
[tex]A_{circle}=\pi r^2[/tex]
So,
[tex]132.7=\pi r^2\\ \\r^2=\dfrac{132.7}{\pi}\\ \\r=\sqrt{\dfrac{132.7}{\pi}}\ ft[/tex]
Now, find the circumference of the circle:
[tex]C=2\pi r\\ \\C=2\pi \cdot \sqrt{\dfrac{132.7}{\pi}}=2\sqrt{132.7\pi}\approx 40.8\ ft[/tex]
Own arranges 48 beads into an array. There are 6 rows of beads. How many columns are there.
Answer:
There will be 8 columns
Step-by-step explanation:
So first you get 48 and divide it by 6 then you get 8 as your answer
Final answer:
To determine the number of columns in a 48-bead array with 6 rows, divide the total beads by the number of rows, which results in 8 columns.
Explanation:
The student has arranged 48 beads into an array with 6 rows. To find out how many columns there are, we divide the total number of beads by the number of rows. Therefore:
Divide 48 by 6.
48 ÷ 6 equals 8.
Thus, there are 8 columns of beads.
Each row has the same number of beads, so with 6 rows and 8 columns, we can visualize the array as a rectangle where every row contains 8 beads.
Solve the equation below
3x—5(x+2)=-40
Answer:
x = 15
Step-by-step explanation:
Step 1: Distribute
3x - 5(x) - 5(2) = -40
3x - 5x - 10 = -40
Step 2: Combine like terms
-2x - 10 = -40
Step 3: Add 10 to both sides
-2x - 10 + 10 = -40 + 10
Step 4: Divide both side by -2
-2x / -2 = -30 / -2
x = 15
(3-2x+2x^²)+(4x-5+3x^2
The answer is: 5 x ^2 + 2 x − 2
Solve.
4x2 + 6 = 40
Round to the nearest hundredth.
Enter your answers in the boxes.
Do 4x^2 = 16x
16x+6 = 40
-6 -6
16x = 34
/16 /16
x=2.125
Rounded to the nearest hundredth is, 2.13
IF THIS IS HELPFUL PLS GIVE ME BRAINLIEST AND ANSWER MY MATH PROBLEM.
Answer:
-2.92 and 2.92
i took the test
Dale travels from city A to city B to city C and back to city A. Each city is exactly 120 miles from the other two. His average rate from city A to city B is 60 mph. His average rate from city B to city C is 40 mph. His average rate from city C to city A is 24 mph. What is Dale's average rate for the entire trip, in miles per hour?
Answer:
[tex]average\ speed = 36\ mi/hr[/tex]
Step-by-step explanation:
Given:
Each city is exactly 120 miles from the other two.
Average rate from city A to city B = 60 mi/hr
Average rate from city B to city C = 40 mi/hr
Average rate from city c to city A = 24 mi/hr
We need to find the Dale's average rate for the entire trip.
Solution:
First we find the total time and total distance by following way.
Time taken to travel from A to B = [tex]\frac{Distance}{Speed} = \frac{120}{60}= 2\ hr[/tex]
Time taken to travel from B to C = [tex]\frac{Distance}{Speed} = \frac{120}{40}= 3\ hr[/tex]
Time taken to travel from C to A = [tex]\frac{Distance}{Speed} = \frac{120}{24}= 5\ hr[/tex]
So, total time taken = [tex]2+3+5=10\ hr[/tex]
Total distance = 120 + 120 + 120 = 360 miles
Using average speed formula.
[tex]average\ speed = \frac{Total\ distance}{Total\ time\ taken}[/tex]
[tex]average\ speed = \frac{360}{10}[/tex]
[tex]average\ speed = 36\ mi/hr[/tex]
Therefore, the average rate for the entire trip [tex]average\ speed = 36\ mi/hr[/tex]
A study of the annual population of gray squirrels in a Texas state park shows the population, S(t), can be represented by the function S(t) = 273(1.073)t , where the t represents the number of years since the study started. Based on the function, what is the growth rate?
A. 9.9
B. 10.4
C. 10.7
D. 11.2
Answer:
0.073
Step-by-step explanation:
The question is about growth function and you are asked to find out the growth rate. Growth function has a format of
y = a(1+r)^t
Where
y= future value = S(t)
a= current value = 273
r= growth rate
t= time =t
Since its a growing function, the r will be positive. If its decay function then the r will be negative. As you can see, the growth rate value is located inside the parentheses. The growth rate of the function should be:
(1+r)= (1.073)
r= 1.073- 1
r= 0.073