Answer:
x = -4
Step-by-step explanation:
2x² + 8x = x² - 16
x² + 8x + 16 = 0
x² + 4x + 4x + 16 = 0
x(x + 4) + 4(x + 4) = 0
(x + 4)² = 0
x = -4
Hi there!
Let's solve this problem step by step!

To find f(3) we must substitute x = 3 into the formula.

Now we use PEMDAS (Parenthesis, exponents, multiply, divide, add, subtract) to find our answer.
Work out the exponents inside the parenthesis first.

And finally multiply.

Hence, the answer is D. 64.
~ Hope this helps you!
Answer:
8.20
Step-by-step explanation:
6.15*4=24.6
since they only bought 3 tickets because of the deal
you divide 24.6 by 3 and get 8.20
Answer: y = 2x - 9
Step-by-step explanation:
I graphed it and did the work in my head-