Can someone explain how to do this, step by step. (Graphing systems of equations.) ty.

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

What is the ratio fraction form of 25: 9