S is a subset within a universal set, U. If S = {x, y, 4, 9, ?}, which could describe U? U = {keys on a keyboard} U = {letters} U = {numbers} U = {punctuation marks}

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

he kicked it up? is this the answer ?

step-by-step explanation: