Answer:
8
Step-by-step explanation:
3+8=11
n^x × n^y= n^x+y
Answer:
I think it's commutative. ;-;
Step-by-step explanation:
Answer:
x+y=11
Step-by-step explanation:
take the square root of both sides.
(x-7) + (y+3) = 7
collect like terms
x+y = 7+7-3
Answer:
x is either 77 or -47
Step-by-step explanation:
cos (90° - x) should be the answer