Hi. i really need with this question. i tried it myself but don't fully understand, so could someone check it for me? you so much.

What is the base of 1/9 to the power of 2

Which of the following is not a subset of {1,2,3}?

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90