Which expression is equivalent to (q2 – 16)? M. (9 - 4)2
P. (q + 4)(9-4)
R. (q + 8)(9 - 2)
s. (9-8)(q + 2)

the 2 in M is raised as well as the one in the question

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.

What is negative 3/9 times negative 2/8 ?

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?