Answer:
There is no expression to evaluate.
Step-by-step explanation:
1x + 8 = 10 + 0.5x
1x - 0.5x = .5x
.5x + 8 = 10
10 - 8 = 2
2/.5 = 4
Therefore, it will take 4 years for the two trees to have grown to the same height.
Answer:
22
Step-by-step explanation:
So we have the two functions:

And we want to find (fog)(5). This is the same as:

So, find g(5) first:

Multiply and subtract:

So, we can substitute:

Find the value:

Multiply and subtract:

So:

And we're done!