Spot the other mistake, I will mark you 5 stars and a favorite

Step-by-step explanation:

- Example for understandment

If x2 = 16 , then the possible values of x are +4, meaning 4 and -4.

4+-4=0, so the sum of all possible values of x are 0.

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.

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3