Question

Can someone help me figure out which equation it is?

Answer 1

10x+10

Explanation:

perimeter is when you add up all four sides. rectangles have two sets of equal lengthed sides. so 2x+9 + 2x+9 + 3x-4 + 3x-4

then you just combine like terms.

Answer 2

10x + 10

=2(2x+9+3x-4)
=2(5x+5)
=10x+10