Answer:
Step-by-step explanation:
I think it might be r= -3
He first travels 15 floors. He then travels 12 floors, to get to the 3rd floor. He finally travels 35 floors, for a total of 62 floors.
Answer:

Step-by-step explanation:
We have the two functions:
and
.
We want to find
.
So, let's use the second function to find
first:

Divide:

Add:

Therefore, our expression is the same to
.
Now, we can substitute 5 for f(x). This yields:

Multiply:

Subtract:

So:

And we're done!