Answer:
42
Step-by-step explanation:
<u>Step 1: Substitute 6 for x</u>
7x
7(6)
<em>42</em>
<em />
Answer: 42
Hdjdjfhonrfn. The answer is c: -4
Let's say that f(x) = ax^2 + bx + c
if f(g(x)) = 9x^2 + 6x + 7:
a(3x + 1)^2 + b(3x + 1) + c = 9x^2 + 6x + 7
9ax^2 + 6ax + a + 3bx + b + c = 9x^2 + 6x + 7
Comparing the two equations, we can see that a = 1, b = 0 and c = 6, therefor f(x) = x^2 + 6
-7x+2y=-13
x-2y=11
add them euations
-7x+2y=-13
<u>1x-2y=11 +</u>
-6x+0y=-2
-6x=-2
divide both sides by -6
x=1/3
sub back
x-2y=11
1/3-2y=11
minus 1/3 both sides
-2y=10 and 2/3
divide both sides by -2 (or times both sides by -1/2)
y=-5 and 1/3
x=1/3
y=-5 and 1/3
(1/3,-16/3)
