7: A cyclist starts a race at 12:30 pm and finishes at 2:10 pm. How long does it take the cyclist to finish the race?

1h 40m

Step-by-step explanatio

12:30 + 30m = 1:00

1:00 + 1h = 2:00

2:00 + 10m = 2:10

30m + 1h + 10m = 1h 40min

idk

step-by-step explanation:

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.