His score was 40 each question was worth 5 points
Valid because 3 x 3 is 9 :))
Answer:
and 
Step-by-step explanation:
Think about it.
What two numbers multiply to -15 and add up to 2?
The answers are 5 and -3.
So plug that into the factored form of a parabola.

To find the x-intercepts, plug in 0 for
.

Since we are multiplying, at least one of the terms has to equal 0.

So the x-intercepts are
and
.
15x-6+x-3=39
16x-9=39
16x=39+9
16x=48
x=48/16
x=3