What the range of u(x)= -2x squr + 3

Given the following statements, which is the best

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

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling