Question

A rectangular box is twice as long as it is wide. The height of the box is 3 feet less than the width. If the box is x feet wide, what polynomial represents its volume in cubic feet?
A)4x-3
B)2x^3+6^2
C)2x^2-6x
D)2x^3-6x^2

Answer 1

^ is powered aka exponent

Answer 2

Let the width = w
Then the height = w - 3
And the length = 2w
Can you use the above definitions to form an equation for the volume?

Answer 3

yes

Answer 4

Do you want to post your equation?

Answer 5

ok

Answer 6

2x-3
2(2x-3) ??? did i set it up right

Answer 7

The volume of the box is:
V = w * 2w * (w-3) = 2w^2(w - 3) = 2w^3 - 6w^2
Substituting x for w:
V = 2x^3 - 6x^2
So the correct choice is D

Answer 8

thank u

Answer 9

You're welcome :)