220= 45*x. I hope you are satisfied with my answer.
Hey!
You have to divide the total amount she has by the surface area.
Surface area = 2(wl+hl+hw)
That gives you:

The surface area is 126 ft. Now divide the total amount she has by the surface area.

<em>That means she can cover 9 boxes</em>

Answer:
Step-by-step explanation:
a² - b² = (a +b)(a - b)
9x² - 4 = (3x)² - 2²
= (3x + 2 )(3x - 2)
Answer:
28
Step-by-step explanation: