Question 487841
Find the vertex of -0.2x^2+12x+11 
the x-value of the vertex:
x = -b/(2a) 
x = -12/(2*(-0.2))
x = -12/(-0.4)
x = 30
.
y-value of vertex:
-0.2x^2+12x+11 
-0.2(30)^2+12(30)+11 
-0.2(900)+12(30)+11 
191
.
vertex is at (30, 191)