Find x if m28 = 5x – 13 and
m21 = 4x + 7

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?

Urgent need asap △abc is similar to △xyz. also, side ab measures 6 cm, side bc measures 18 cm, and side xy measures 12 cm. what is the measure of side yz ? enter your answer in the box.

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)