Question

Can someone please help me with this one? I’m very confused, how can you solve for the width if the problem doesn’t tell you what a and b are for the length? And after, can you tell me which letter it is? I just randomly guessed B, but idk if it’s correct and I need work to support my answer too. Whoever helps me first will get brainliest

Answer 1

Answer:

A. (2x-3)/2

Step-by-step explanation:

Performing the long division indicated by the perimeter expression, you find ...

perimeter = (2x -3) + (10x +6)/(x^2 +2x)

Comparing this to the formula for the perimeter ...

perimeter = 2W +2L

where L is said to be of the form (ax +b)/(x^2 +2x)

we can match terms in the perimeter expression to see that ...

2W = 2x -3

2L = (10x +6)/(x^2 +2x)

The problem doesn't ask for it, but we can see that (a, b) = (5, 3). We can also see that ...

W = (2x -3)/2 . . . . . . . matches choice A