The given equation describes a linear relationship between temperature and time. The slope, -0.7, indicates that the temperature is dropping at a rate of 0.7 degrees per unit of time.
Explanation:The equation given, T=42-0.7t, is in the form of a linear equation, y=mx+b, where T is the temperature in degrees Celsius, t is the time, 42 represents an initial temperature, and -0.7 is the slope representing the rate of temperature change over time.
In this equation, the slope, -0.7, tells us that the temperature is decreasing or dropping at a rate of 0.7 degrees per unit of time. This could be per minute, per hour, etc., depending on the context given.
Note that because the '-0.7' is negative, we know that the temperature is decreasing, or dropping, rather than increasing. If it were positive, it would mean the temperature is rising. Thus, when you're asked how fast the temperature is dropping, the answer based on this equation is that it's dropping at a rate of 0.7 degrees per unit of time.
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The temperature drops at a rate of 0.7 degrees per time unit, as indicated by the coefficient of t in the equation T = 42 - 0.7t.
The equation given, T = 42 - 0.7t, suggests a relationship between temperature (T) and time (t), where the temperature drops over time due to some cooling process, such as a cold front arriving. To determine how fast the temperature is dropping, we look at the coefficient of t in the equation, which is -0.7. This means that for every unit of time that passes, the temperature drops by 0.7 units. Thus, the rate of temperature drop is 0.7 degrees per time unit, assuming the temperature is measured in degrees and time in matching time units (likely minutes or seconds).
Anton's family drove 216 mi to the lake averaging 48 mi/h . On the return trip home they averaged 54 mi/h .
What was the total time that Anton's family spent driving to and from the lake?
The total time that Anton's family spent driving to and from the lake is 8.5 hours
Solution:
Time taken is given by formula:
[tex]Time = \frac{distance}{speed}[/tex]
Anton's family drove 216 mi to the lake averaging 48 mi/h
⇒ Anton's family drove total distance = 216 mi les
⇒ Speed of Antony's family driving to lake = 48 miles per hour
[tex]Time = \frac{216}{48} = 4.5[/tex]
Therefore, time taken to drive to lake is 4.5 hour
On the return trip home they averaged 54 mi/h
[tex]Time = \frac{216}{54} = 4[/tex]
Therefore, time taken to return home is 4 hours
Total time = 4.5 + 4 = 8.5 hours
Thus the total time that Anton's family spent driving to and from the lake is 8.5 hours
Question is in the problem, help please
Answer:
π units²
Step-by-step explanation:
The area (A) of a circle is calculated as
A = πr² ← r is the radius
Here diameter d = 2, thus r = 2 ÷ 2 = 1, thus
A = π × 1² = π × 1 = π units² ← exact solution
or A = 3.14 units² ← as a decimal
Plz help now for 30 points k
Find total of non blue socks:
7 + 8 + 4 = 19
There are 9 blue socks.
Ratio is blue / non blue = 9/19
2 + a/6 = -4 what is a?
Answer:
a= -36
Step-by-step explanation:
1. Subtract 2 from both sides
2 + a/6 -2 = -4 -2
2. Simplify
a/6 = -6
3. Multiply both sides by 6
6a/6 = 6(-6)
4. Simplify
a = -36
How many times can 27 go into 224
Roger wants to buy 58 tennis balls. Estimate how many canisters he would have to buy if there are 3 tennis balls per canister by rounding the total number of tennis balls to the nearest tens place.
20 canisters
Step-by-step explanation:
Long divide the 58 by 3 to get 19.3 repeating. Then round off to 20. Hope this helps!
Final answer:
After rounding 58 tennis balls to the nearest ten, Roger would need to buy approximately 20 canisters, with each canister containing 3 tennis balls.
Explanation:
Roger wants to buy 58 tennis balls and needs to estimate how many canisters he would have to buy if there are 3 tennis balls per canister. To estimate, we round the total number of tennis balls to the nearest tens place. Rounding 58 to the nearest ten gives us 60. To find the number of canisters needed, we divide the rounded number of tennis balls by the number of balls per canister:
60 ÷ 3 = 20 canisters
Therefore, Roger would need to buy approximately 20 canisters to have around 60 tennis balls.
A class will have 1 test and 5 homework assignments to complete. If the test is worth 80 points and each homework assignment is work 25% of the test, how many points may be earned during this unit?
Answer:
180 points.
Step-by-step explanation:
Given:
A class will have 1 test and 5 homework assignments to complete.
The test is worth 80 points.
Each homework assignment is work 25% of the test.
Question asked:
How many points may be earned during this unit ?
Solution:
By unitary method:
Points may be earned from 1 assignments = [tex]25\% of 80[/tex] (given)
= [tex]\frac{25}{100} \times 80 = \frac{2000}{100} = 20[/tex]
Points may be earned from 5 assignments = [tex]5\times 20 = 100[/tex]
Points may be earned from 1 test = [tex]80[/tex]
Total points may be earned = 100 + 80 = 180
Therefore, 180 points may be earned during this unit.
Questiul 4 15 points)
Laurie and Maya sold at most $50 worth of get-well and friendship cards. The
friendship cards, x, were sold for $2 each and the get-well cards, y, were sold for
$1.50 each. Which point represents a reasonable number of cards sold?
Answer:
2 dollars cuz ur poor
Step-by-step explanation:
9. A relation contains the points ( -5,-10),( -2,-4)(-1,-2),(4,8) and (5,10) . Is this a function? Explain. (2 points)
Answer:
Yes it is a function given by f(x) = 2x
Step-by-step explanation:
Any function can approximated as series or a polynomial. For example,
[tex]e^{x} = 1 + \frac{x}{1!} + \frac{x^{2}}{2!} + \frac{x^{3}}{3!} ...[/tex] (exponential function)
(n! or n factorial is equal to n(n-1)(n-2)...3.2.1 ; 3! = 3.2.1 = 6)
and for the series to converge(the sum does not go to infinity), higher order terms must tend to zero.
General form of a polynomial/series: [tex]f(x) = a + bx +cx^{2} + ...[/tex]
For the given set of points, we can start with the straight line equation:
[tex]f(x) = y = a + bx[/tex] ........(1)
Let us take two points from the given relation: (-5, -10), (-1, -2)
and put the respective x and y values in equation (1), we get two equations, which we can then solve simultaneously to get values of [tex]a[/tex] and [tex]b[/tex]:
[tex]-10=a-5b[/tex] ........(2)
[tex]-2=a-b[/tex] ..........(3)
Now (3) - (2) gives us: [tex]b=2[/tex] and putting the value of [tex]b[/tex] in any of the above equation gives us [tex]a=0[/tex]
Hence, we get the equation, [tex]f(x)=y=2x[/tex]
It can be seen that all the given points satisfies this relation and since we get a unique [tex]y[/tex] for every [tex]x[/tex], we can call this a function.
Final answer:
The provided relation is a function because each x-value is unique and maps to exactly one y-value, fulfilling the criterion that every element of the domain is associated with exactly one element of the range.
Explanation:
The question asks if a relation containing the points (-5,-10), (-2,-4), (-1,-2), (4,8), and (5,10) is a function. To determine if this relation is a function, we need to examine if any x-value (the first number in each pair) repeats with a different y-value (the second number in each pair). Upon inspection, we see that each x-value is unique to a single y-value, which means that each element of the domain maps to a unique value in the range. Therefore, we can conclude that this relation is indeed a function.
In general, a function is defined as a relation in which every element of the domain (set of all first elements) is associated with exactly one element of the range (set of all second elements). This criterion is met in the relation provided as each x-value is unique and paired with only one y-value.
Elle is buying new flooring for her kitchen
and laundry room. She knows that the
area of the kitchen is 132 square feet. The
laundry room is 8 1/3 feet by 6 3/4 feet. What is
the total area of the two rooms?
Answer:
The total area of the two rooms is 188.25 square feet
Step-by-step explanation:
Given:
Area of the kitchen = 132 square feet.
Dimension of the Laundry room = 8 1/3 feet by 6 3/4 feet.
To Find:
The total area of the two rooms = ?
Solution:
Area of the two rooms = Area of the kitchen + Area of the laundry room
Area of the two rooms = 132 + Area of the laundry room
Area of the laundry room =[tex](8 \frac{1}{3}) \times (6 \frac{3}{4})[/tex]
Area of the laundry room =[tex]\frac{25}{3} \times \frac{27}{4}[/tex]
Area of the laundry = [tex]\frac{675}{12}[/tex]
Area of the two rooms = [tex]132 + \frac{675}{12}[/tex]
Area of the two rooms = 132 + 56.25
Area of the two rooms = 188.25 square feet
Final answer:
The total area of Elle's kitchen and laundry room combined is 188.25 square feet. This is found by first calculating the area of the laundry room with given dimensions and then adding it to the area of the kitchen.
Explanation:
The question involves finding the total area of two rooms, given the area of one and the dimensions of the other. The kitchen has an area of 132 square feet. For the laundry room, we need to calculate the area by multiplying its length and width. The dimensions are 8 1/3 feet by 6 3/4 feet. To find the area, convert mixed numbers to improper fractions: 8 1/3 becomes 25/3 feet, and 6 3/4 becomes 27/4 feet. The area is then calculated as (25/3) * (27/4) square feet.
To compute this, multiply the numerators and denominators separately: (25*27) / (3*4) = 675 / 12, which simplifies to 56.25 square feet. Now, add the area of the laundry room to the area of the kitchen to get the total area of both rooms: 132 + 56.25 = 188.25 square feet. Therefore, the total area of the two rooms is 188.25 square feet.
Find the value of x and explain please
ANSWER ASAP!!!!!!!!!!!!!!!!!
Answer:
y = - 4
Step-by-step explanation:
Given
y = 2 - 9x ← substitute x = [tex]\frac{2}{3}[/tex]
y = 2 - ( 9 × [tex]\frac{2}{3}[/tex] ) ← cancel the 9 and 3 by 3
= 2 - (3 × 2 )
= 2 - 6
= - 4
What is the answer to this equation
3 3/7 + 4 5/7=
Answer:
8 1/7Step-by-step explanation:
First,you take 3 and 3/7 and line it up with 4 and 5/7 and first you add your whole numbers which come before the fractions and get 7.Next,you add the fractions and get 8/7. Now you know it needs symplified because its an improper fraction. To symplify you have to × or ÷ and whatever one you do you have to do it to both the numerator and denominator. If you divide 8÷7=1 R1 7÷7=1. Last add 7+1+1/7=8 1/7.
Solve this equation 3x4x4x15-14+1= ?
Answer:
my answer is 707
Step-by-step explanation:
i used a calculator lol
Answer:
707
Step-by-step explanation:
SHOW ALL WORK: Graph each lineby plotting its intercepts or by using the y intercept and slope. {2x-y=4 {3y-3x=6
Answer:
x-y=-2
Step-by-step explanation:
Divide both sides if the equations by 3.
(3y-3x)÷3=6÷3
y-3x÷3=2
calculate the quotient
y-x=2
multiply both sides of the equation bub -1
-1x(-x)-1y=-1x2
any expression multiplied by -1
x-1y=-1x2
any expression multiplied by 1 remains the same.
x--y=-1x2
x-y=-2
Use the distributive property to create an equivalent expression to 7x divided by 56 use GCF
Answer:
x/8
Step-by-step explanation:
7x/56=x/8
A ticket at a movie theater costs $8.50. One night, the theater had $29,886 in ticket sales.
Which is the best estimate for the number of tickets sold?
2,000
30,000
3,000
4,000
Answer:
i would guess 3000
Step-by-step explanation:
this is because i rounded 8.50 to 10. and rounded 29886 to 30000
[tex]30000 \div 10 = 3000[/tex]
What is the radius of a
cylinder with a diameter of
36?
Answer:
radius=diameter÷2=36÷2=13
Yo sup??
diameter=2*radius
36=2 r
r=18
therefore the radius is 18 units
Hope this helps
Lesson 12 Homework
A rectangular garden has a total area of 48 square yards. Draw and label two possible rectangular
gardens with different side lengths that have the same area.
on the fifth figure in
See picture for solution to your problem.
nanci has a large fish tank that contains fish. The ratio of orange fish to black fish is 5:8. If nanci has a total of 20 orange fish, then how many black fish are inn the tank?
Answer:
32 black fish
Step-by-step explanation:
1. set up a ratio
[tex]\frac{5}{8} = \frac{20}{?}[/tex]
2. we know that we have to multiply by 4 to get from 5 orange fish to 20 orange fish. Therefore we multiply the 8 black fish by 4 as well to get 32 black fish
[tex]\frac{5}{8} =\frac{20}{32}[/tex]
2453 minus 249 equals
Answer: 2,204
Step-by-step explanation:
Final answer:
To solve 2453 minus 249, align the numbers by place value and subtract each column starting from the rightmost digit, borrowing where necessary. The result of 2453 minus 249 is 2204.
Explanation:
The question is a basic arithmetic problem involving subtraction. The task is to subtract 249 from 2453. We write the numbers in column form, aligning the units, tens, hundreds, and thousands places properly:
2453
- 249
------
We start subtracting from the rightmost digit (units place) and proceed to the left:
Finally, subtract in the thousands place: 2 minus 0 is 2.
After completing the subtraction, we have the result:
2204
Therefore, 2453 minus 249 equals 2204.
WILL GIVE BRAINLIEST!?!?!!?!?!? WHATS 9+10?????
Suppose h(t)= -0.2 + 2t models the height, in feet, of a ball that is kicked into the air where t is given as time in seconds
The maximum height of the ball is found at 64 feet
Explanation:Hello! remember to write complete and clear questions in order to get good and exact answers. I've found a similar question so I have written it in a comment above. We know that h(t) models the height, in feet, of a ball that is kicked into the air where t is given as time in seconds. This equation follows a quadratic function so from math we know that the maximum or minimum of this type of functions is found at the vertex of its graph. So:
[tex]f(x)=ax^2+bx+c \\ \\ \\ Vertex \ (h,k): \\ \\ h=-\frac{b}{2a} \\ \\ k=f(-\frac{b}{2a}) \\ \\ \\ Our \ function \ is: \\ \\ h(t)=-16t^2+64t \\ \\ \\ Comparing: \\ \\ a=-16 \\ \\ b=64 \\ \\ c=0 \\ \\ \\ h=-(\frac{64}{2(-16)})=2 \\ \\ k=-16(2)^2+64(2) \\ \\ k=64[/tex]
Finally, the maximum height of the ball is found at 64 feet
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She gave 1/3 of cookies for her husband 1/4 of the cookies to her son and 1/6 of a cookies to her neighbor she ate the remaining six cookies how many cookies did she make
She made 15 cookies
Solution:
Let "x" be the number of cookies she made
She gave 1/3 of cookies for her husband
Therefore,
[tex]Husband = \frac{1}{3}x[/tex]
Find the remaining
[tex]Remaining = x - \frac{x}{3} = \frac{3x-x}{3} = \frac{2x}{3}[/tex]
1/4 of the cookies to her son
Therefore,
[tex]son = \frac{1}{4} \times \frac{2x}{3} = \frac{x}{6}[/tex]
Now again find the remaining
[tex]Remaining = \frac{2x}{3} - \frac{x}{6} = \frac{x}{2}[/tex]
1/6 of a cookies to her neighbor
[tex]Neighbor = \frac{1}{6} \times \frac{x}{2} = \frac{x}{12}[/tex]
Now again find the remaining
[tex]Remaining = \frac{x}{2} - \frac{x}{12} = \frac{5x}{12}[/tex]
She ate the remaining six cookies
Therefore,
[tex]\frac{5x}{12} = 6\\\\5x = 72\\\\x = 14.4[/tex]
Thus she made approximately 15 cookies
What is the value of the function FX equals 4X +9 when X equals
What is the answer to this 4×3^2?
Evaluate the expression.
Answer:
36
Step-by-step explanation:
The first thing to simplify is the Exponents
3^2 means 3 multiplied by it self 2 times
3×3=9
4×3^2
4×9
36
What is 2 = f - 27.
Answer:
F=29
Step-by-step explanation:
27+2
Answer:
f=29
Step-by-step explanation:
A rectangular box of height 10 has a base with edges of length 10. What is the length of a diagonal of this box?
Answer:
The diagonal of the box is [tex]D=10\sqrt{3}\ units[/tex]
Step-by-step explanation:
Let
d ----> the diagonal of the base
D ---> the diagonal of the box
step 1
Find the diagonal of the base
Applying the Pythagorean Theorem
[tex]d^2=10^2+10^2[/tex]
[tex]d^2=200[/tex]
[tex]d=10\sqrt{2}\ units[/tex]
step 2
Find the diagonal of the box
In this part the legs of the right triangle are the height of the box and the diagonal of the base
so
Applying the Pythagorean Theorem
[tex]D^2=10^2+(10\sqrt2)^2[/tex]
[tex]D^2=300[/tex]
[tex]D=10\sqrt{3}\ units[/tex]
I need help with this asap.
4a, b, c
From this problem, we know that during the weekend Fiona bought some frozen seafood at the market. She bought the following things:
A large tray of sardinesA 3 kg bag of squidA 2kg box of musselsLet:
x: The large tray of sardines
y: The 3 kg bag of squid
z: The 2kg box of mussels
Then, we have the following information:
The sardines and the squid cost €50:
[tex]x+y=50 \ ... \ eq1[/tex]
The sardines and the mussels cost €43:
[tex]x+z=43 \ ... \ eq2[/tex]
The squid and the mussels cost €26:
[tex]y+z=26 \ ... \ eq3[/tex]
Isolating x from eq 1 and substituting into eq 2:
[tex]From \ eq1: \\ \\ x=50-y \\ \\ \\ Substituting \ into \ eq2: \\ \\ (50-y)+z=43 \\ \\ -y+z=43-50 \\ \\ -y+z=-7 \ ... \ eq4[/tex]
Adding eq3 and eq4:
[tex]\ \ y+z=26 \\ \\ -y+z=-7 \\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ \\ \\ 2z=19 \\ \\ z=9.5[/tex]
From eq 3:
[tex]y+z=26 \\ \\ y+9.5=26 \\ \\ y=26-9.5 \\ \\ y=16.5[/tex]
From eq 1:
[tex]x=50-y \\ \\ x=50-16.5 \\ \\ x=33.5[/tex]
Finally:
A large tray of sardines cost €33.5A 3 kg bag of squid cost €16.5A 2kg box of mussels cost €9.5Learn more:Solving systems of linear equations: https://brainly.com/question/13799715
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4√6 •√3 how do I show work for this because the answer is 2√12
Answer:
[tex]4 \sqrt{6} \times \sqrt{3} = 12 \sqrt{2} [/tex]
Step-by-step explanation:
We want to simplify the radical expression:
[tex]4 \sqrt{6} \times \sqrt{3} [/tex]
We write √6 as √(2*3).
This implies that:
[tex]4 \sqrt{6} \times \sqrt{3} = 4 \sqrt{2 \times 3} \times \sqrt{3} [/tex]
We now split the radical for √(2*3) to get:
[tex]4 \sqrt{6} \times \sqrt{3} = 4 \sqrt{2} \times \sqrt{3} \times \sqrt{3} [/tex]
We obtain a perfect square at the far right.
[tex]4 \sqrt{6} \times \sqrt{3} = 4 \sqrt{2} \times (\sqrt{3} )^{2} [/tex]
This simplifies to
[tex]4 \sqrt{6} \times \sqrt{3} = 4 \sqrt{2} \times 3[/tex]
This gives us:
[tex]4 \sqrt{6} \times \sqrt{3} = 4 \times 3 \sqrt{2} [/tex]
and finally, we have:
[tex]4 \sqrt{6} \times \sqrt{3} = 12 \sqrt{2} [/tex]
Write an expression with two terms. 1 term should have a coefficient with a variable and the other term should be constant. Name the coefficient, the variable, and the constant in the expression. Then write a word phrase for your expression.
________________________________________________________________________________________________________________________________________
Answer:
y = 2x + 5
Step-by-step explanation:
The 2 would be the coefficient with x as a variable, and the 5 would be the constant.
At the beginning of the day Jessica had 5 dollars (constant), and for every hour she worked (variable), she made 2 dollars (coefficient).
An example of an expression with two terms is 3x + 5, where 3 is the coefficient, x is the variable, and 5 is the constant. A word phrase for this expression is "Three times a number plus five."
An example of an expression with two terms where one term has a coefficient with a variable and the other term is constant is:
3x + 5
In this expression:
The coefficient is 3.
The variable is x.
The constant is 5.
A word phrase for this expression could be: "Three times a number plus five."