The library question , and can u explain, i’ll give many points

1,260 books are due back this week.

Step-by-step explanation:

So, 12500/5 = 2500

2500 * 2 = 5000

5000 is 2/5 out of 12,500

19000/5 = 3800

3800 * 2 = 7600

7600 is 2/5 out of 19000.

7600 + 5000 = 12,600

12600 total books are checked out.

12600/10 = 1260

1260 * 1 = 1260

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.