Using route A, Olivia can drive to school in 24 minutes, unless there is traffic, in which case it takes 37 minutes. She can drive to school using route B in 22 minutes, unless there is traffic, in which case it takes 29 minutes. The chance of traffic is 40% on route A and 10% on route B. Which route has the smaller expected driving time? By how much?

45

step-by-step explanation:

if x = 1, then the answer is 3.5

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.