Need ! 7th grade pre-algebra! 2 questions!

7.  Factor.  (x - 2)(4x + 5) = 0 The zeroes are 2 and -5/4. The answer is C. 
8. Vertex form is: f (x) = a(x - h)^2 + k and (h, k) is the vertex.
So plug in. f(x)=a(x+1)^2-10
Plug in x and y to find k.
2 = a(1+1)^2-10
2=a(2)^2-10
2=4a-10
4a=12
a=3
f(x)=3(x+1)^2-10
H is the answer.

Four times the first number is three more than three times the second number.

Step-by-step explanation: