Find the value of "c" that makes x^2+ 12+ c

Can someone me with my math problem pls my teacher is on my back about this

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

Which graph shows the solution to the system of linear inequalities? y-4t< 4 y