Multiply (3c+2p)(3c-2p) what is the answer?​

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?