if angles A and B are consecutive interior angles, what is the measure of angle B if angle A measures 75

Simplify the expression. -2/5(10+15m-20n)

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

If you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain.