F(x) = 2x+6 ; vertical shrink by a factor of 1/2

Ineed i been stuck on this question since yesterday

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

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x