*will mark brainiest*

1. what is the length of the side of the brick labeled a?
2. what is the length of the side of the brick labeled b?
3. what is the total height of the wall?
4. what is the total length of the wall?

1=5in 2=8in 3=8in 4=5in

Step-by-step explanation: please go answer my recent question

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.