What is the solution of k=3.5?? the answers it gives me is
4k=14.5
3+k=3.8
7k=24.5
6.5+k=10.5

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

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Felix wrote several equations and determined that only one of the equations has no solution. which of these equations has no solution?