Answer:
If you actually meant f(x)=2x+3x−1 ,
then note it can be rewritten as:
f(x)=2x−2+5x−1=2+5x−1=y
At this point you can find x in terms of y (“make x the subject”):
y−2=5x−1⟹1y−2=x−15
⟹x=5y−2+1=y+3y−2
Switch variables back to x, and you have the inverse function of f:
g(x)=x+3x−2
How do you know you’ve calculated correctly? The composition of f with g should result in x — that is, evaluate f(g) and you should get the result x:
48 = 4(x-2)
48 = 4x -8
56= 4x
14=x
x-2 = 12
one side is 12 inches long
Answer:
4 5/8
Step-by-step explanation:
7 7/8 - 3 1/4
7 7/8 - 3 2/8
4 5/8
