Simplify. rewrite the expression in the form 5n. 5^-5 /5^8

Plz which expression is equivalent to the expression below?

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.