Select all the equations where c=9 is a solution choose 2 answers a. 4-c=5 b. 20=14+c c. 15=c-6 d. c divided by 3=3

we are given

c=9  is a solution

we will select each options and then verify it

option-A:

Subtract both sides 4

Multiply both sides by -1

so, this is FALSE

option-B:

Subtract both sides by 14

so, this is FALSE

option-C:

Add both sides by 6

so, this is FALSE

option-D:

Multiply both sides by 3

so, this is TRUE

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

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.