If angle 1 and angle 2 form a linear pair and m angle 1 = 72°, find m angle 2.
a.
18°
c.
144°
b.
72°
d.
108°

Well since it's a linear pair it equals to 180 degrees. So if angle 1 is 72 degrees, all you have to do to find angle 2 is subtract 72 from 180, and you have 108 degrees.

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable