Give The measures of the angle that is complementary to the given angle 

How do i do this activity, is appreciated

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.