Answer:

Step-by-step explanation:
You can do this using the quadratic equation:

Let's first setup our expression:
4x² + 12x = 135
the quadratic formula is:
ax² + bx + c = 0
4x² + 12x - 135 = 0
Then:
a = 4
b = 12
c = -135
Now we plug in our coefficients and solve:

We solve for both to determine the positive one:





So if you are looking for a positive solution, just take the positive one as x.
Answer:
It's the 3rd one
Step-by-step explanation:
Answer:
If he scored x points in the first half, then x + p = 31
Square D because 2/8 are not shaded. 2/8=1/4 and 1/4=25%