Answer:
B. -4
Step-by-step explanation:
We want to find x such that f(x)=18.
We need to therefore solve 9x+54=18 forx.
9x+54=18
Divide both sides by 9:
(9x+54)/9=18/9
9x/9+54/9=18/9
Simplify:
x+6=2
Subtract 6 on both sides:
x=2-6
Simplify
x=-4.
So f(-4) should have value 18.
Let's check.
f(x)=9x+54
f(-4)=9(-4)+54
f(-4)=-36+54
f(-4)=18
So the answer is B.
Answer:
C :) hope it helps
Step-by-step explanation:
First you do: -3 (2x-4)
You get: -6x+12
Now you have: 5x-6x+12
5x-6x=-x
Now you have: -x+12
-x+12=12-x
So yes: 5x-3(2x-4)=12-x
Answer:
0.30a + 0.50 (4+a) = 3.60
Step-by-step explanation: