Mary is 63.5 inches tall and her sister tonya is 70 inches tall. tonya wants to know how many inches taller she is than mary. which equation and solution can be used to solve this problem?

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.

Are the corresponding angles congruent? explain why or why not.

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2