If a binomial

is a factor of a polynomial, then

is a root of this polynomial.
Answer:
10
Step-by-step explanation:
let the number be n then half the number is
n, then
n +
n = 15
Multiply through by 2 to clear the fraction
2n + n = 30, that is
3n = 30 ( divide both sides by 3 )
n = 10
Thus the number is 10
Where they intersect is (-1,2) hope this helps
I think the answer would be D 78 hope it helps