What is the y-value of the vertex of the function f(x)=-(x-3)(x+11)?
a.-8
b.-4 c.33 d.49

Solve the system of equations. y= 2x y= x^2 - 15

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.