What is the x-value of the vertex of f(x) = -x2 + 9x - 11 ?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Identify the slope an intercept of the following linear equation y = 1/5x - 6 a. slope: 1/5; intercept: -6 b. slope: 5; intercept: -6 c. slope: -1/5; intercept: 6 d. slope: 1/5; intercept: 6