I think the correct answers are:
f ----> d
<span>f' ----> c
</span><span>f'' ---> b
</span><span>f''' ---> a
f' signifies the slope of the function f. so f" is the slope of the slope and so on.</span>
X+(x+2)+(x+4)= 66
3x+6=66
3x=60
x=20
20,22, and 24. so 20 is the answer
Combine like terms to get
