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IRISSAK [1]
2 years ago
5

Suppose the manager of a gas station monitors how many bags of ice he sells daily along with recording the highest temperature e

ach day during the summer. The data are plotted with temperature, in degrees Fahrenheit (°F), as the explanatory variable and the number of ice bags sold that day as the response variable. The least squares regression (LSR) line for the data is ????ˆ=−125.30+2.32???? . On one of the observed days, the temperature was 82 °F and 68 bags of ice were sold. Determine the number of bags of ice predicted to be sold by the LSR line, ????ˆ , when the temperature is 82 °F. Enter your answer as a whole number, rounding if necessary.
Mathematics
1 answer:
Naily [24]2 years ago
7 0
I don’t have the time for my birthday but I’m just asking for a little
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Justify each step in solving the equation 4x = 7(x-3) by writing a reason for each statement
abruzzese [7]
Start with parenthesis so that will be 7x -21so then  you will get 4x = 7x -21 then you will subtract 7x and 4x and you will get -3x = -21 and your answer is 7 because both numbers are a negative and that will equal a positive.
8 0
3 years ago
Evaluate sin2 (pi/4) + cos2 (pi/4).
Irina-Kira [14]

Answer:

sin^2(\pi/4)+cos^2(\pi/4)=1

Step-by-step explanation:

Notice that you don't need to evaluate the actual sin and cos functions, since you are in the presence of a well known Pythagorean identity that states that this type of addition of squares for the same angle should equal 1:

sin^2(x)+cos^2(x)=1

So, as long as the angle "x" is the same in both trig functions, this addition should render "1" (one).

Because in this case the angle involved is the same (in both cases pi/4), the identity is valid.

4 0
3 years ago
Two less than five times a number, x, is forty-eight.
erma4kov [3.2K]

analyze the problem

i think you want me to solve for x

so, 5x-2=48

move two to other side an then add

5x=50

divide

x=10

4 0
2 years ago
Read 2 more answers
The volume of a rectangular prism is a minimum of 25 cubic feet. The height of the prism is 3 feet more than its width, and its
ella [17]

Answer: Option C, she used the wrong symbol in the first inequality.

Step-by-step explanation:

For a rectangular prism of length L, width W and height H, the volume is:

V = L*W*H

We know that the volume of the prism is a minimum of 25 ft^3

Then:

V ≥ 25ft^3

We also know that:

"The height of the prism is 3 feet more than its width"

H = W + 3ft

"and its length is at most 5 feet more than the width"

L ≤ W + 5ft

Then we have the system:

V ≥ 25ft^3

H = W + 3ft

L ≤ W + 5ft

Now we can rewrite the volume as:

V = L*W*H

V = L*W*(W + 3ft)

Now we can replace L by the inequality L ≤ W + 5ft

Then we get:

V ≤ (W + 5ft)*W*(W + 3ft)

V ≤ W^3 + 8ft*W^2 + 15ft*W

Then the inequalities are:

V ≤ W^3 + 8ft*W^2 + 15ft*W

V ≥ 25ft^3

Then the error in Carla's system is the symbol of the first inequality, where Carla used "<" instead of "≤"

The correct option is C

5 0
3 years ago
Read 2 more answers
Angelina has 5 cakes. She wants to cut them into 2/5 pieces. How many pieces will she be able to cut?​
Ratling [72]

Answer:

12 whole pieces and 12.5 pieces if you don't want a whole answer. :P

Step-by-step explanation:

Do 5 / (2/5) = 5 x (5/2) = 25/2 = 12 1/2 OR 12.5. Again, if you want a whole number, 12 whole pieces.

Hope that helps!

6 0
2 years ago
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