Question

The city wants to build a football field. Each wheelbarrow full of dirt covers an area of. Determine how many wheelbarrows full of dirt they need for the field below.

Answer 1

Answer:
`5x^(2)+45x`

Explanation:

1. First, you must calculate the area of the football field. It is a rectangle, therefore, multiply the lenght by the width to calculate the area:

`Area=lenght*width\\Area=(10x^(2)+90x)5x^(2)\\Area=50x^(4)+450x^(3)`

2. Then, divide this area by the area covered by a wheelbarrow full of dirt.

`x`: number of wheelbarrows full of dirt needed for the field.

`x=(50x^(4)+450x^(3))/(10x^(2))=5x^(2)+45x`