15. Min-Ji injured her elbow during a varsity softball game. Her doctor has recommended physical therapy several times a week. Min-Ji's parents want to plan for the potential cost of therapy over
the course of a month. They pay $150 a month for insurance and then another $30 fee each time
Min-Ji goes to physical therapy.
a. What equation models the total fees for physical therapy?

if you was gonna solve for a, a is a   < -12

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!

can you post the graph?