Question

Medal to help _The area of a rectangular pool is
10x 2 - 19x-15 the length of the poll is 5x +3..What is the width ?
a. 2x -18
b.2x-5
c.5x-5
d.5x-22
I think it is b.2x-5

Answer 1

well multiply the length by each choice

Answer 2

you are right

Answer 3

The area is length*width. This allows us to check your answer:
\[ \text{length * your width = }(5x + 3)(2x - 5) = 10x^2 - 25x + 6x - 15\\ = 10x^2 - 19x - 15 \text{ = area}\]