Question

Use the quadratic function f(x)= -5x^2+ 11x +8 to find the vertex

Answer 1

Explanation:

x value of vertex is -b/2a which is 11/10 or 1.1 for x

sub it in in equation to get -5(121/100)+11(11/10)+8 and solve that to get 14.05 for y

So vertex is (1.1, 14.05)