Answer:
69.3
Step-by-step explanation:
Divide both sides by 4.5
312/4.5 : 4.5/4.5
69.3 : 1
4x=12. Divide by 4 so x=3
Answer:
f(4) = 23
Step-by-step explanation:
Plug x = 4
You could set up a proportion
86/x = 98/100
Then solve for x, I'll do it by cross-multiplying.
86 times 100 divided by 98 = 87.755102
87-88 problems
12/15 simplifies to 4/5, whereas all the others simplify to 2/3. Therefore, 12/15 is not equivalent to the rest.
