X=4
2(3)+2(5)=16
2x+2(3x-8)=16
2x+6x-16=16
8x=32
X=4
Answer:
7a^2-ab-9b^2
Step-by-step explanation:
Let's do this in two steps. First, we multiply the first two parentheses:
(a+2b)(4a-5b)
4a^2-5ab+8ab-10b^2 = 4a^2+3ab-10b^2
Then, do the other two parentheses:
(3a-b)(b-a)
3ab-3a^2-b^2+ab = 4ab-3a^2-b^2
Then, combine them:
4a^2+3ab-10b^2-4ab+3a^2+b^2 = 7a^2-ab-9b^2
Answer:
Step-by-step explanation:
First replace f(x) with y

Then switch the variables

Solve for the new y value


The answer is the last one 480cm2