Answer:
The answers are, "John saves $35 dollars the first week" and "John is saving at a faster rate than Barb"
The answer is going to be 1/9
<em>Note: Your question seems a little bit ambiguous. So, I am assuming the given function f(x)=9x+7.</em>
<em>Thus, I am solving based on it. It would still clear your concept. </em>
Answer:
The inverse of f(x)=9x+7
Step-by-step explanation:
Given the function

A function g is the inverse of function f if for y=f(x), x=g(y)
Replace x with y

solve for y


Therefore,
The inverse of f(x)=9x+7 is:
i.e.

Answer:
1. $155 ≥ $31.50p + $13.25
2. p ≤ 4