Why does math get so hard that you have an answer but you forget what your answer was because it was so so so so so so so so so so so so so so hard. Why is it hard?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

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.

Find two consexutive odd integers such that the sum of their square is 650