F(x)=2x-x²+3 determine the vertex

Brainliest ! which of the coordinates are not of th vertices of the feasible region for the system of inequalities y≤4,,x≤5,x+y> 6 a(2,4) b(0,6) c(5,4) d(5,1)

The box plots show the average speeds, in miles per hour, for the race cars in two different races. which correctly describes the consistency of the speeds of the cars in the two races?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585