Question

The zeros of a parabola are -5 and -3. The point (0, 60) is on the graph as represented by the equation.

60=a(0+5)(0+3)
What is the value of a?
−7.5
−4
4
7.5

Answer 1

C) 4

Explanation:

60=a(0+5)(0+3)

60 = a(5)(3)

60 = 15a

a = 60/15

a = 4

Answer 2

a=4

Explanation:

60=a(0+5)(0+3)

We can simplify this equation

60 = a (5) (3)

60 = a(15)

Divide each side by 15

60/15 = 15a/15

4 =a