Use the commutative property for addition to rearrange the algebraic expression 5x-7y-8x+y

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

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