(10-7)- (1+6)
can someone explain how to get the answer in words or numbers

4 or -4

Step-by-step explanation:

10-7=3 then 1+6=7 3-7=-4

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.