
Concept explainers
a.
To calculate: The prices of oil change, a radiator flush and a brake pad replacement.
a.

Answer to Problem 22PPS
The prices of oil change, a radiator flush and a brake pad replacementare
Explanation of Solution
Given information:
Price for oil change andreplacing radiator flush is
Calculation:
It is provided that Price for oil change andreplacing radiator flush is
Let price for oil change isx , replacing radiator flush be y and replacing brake pad be z .
Price for oil change andreplacing radiator flush is
Price for replacing brake pads and oil change is
Price for oil change, replacing radiator flush and brake pads is
The system of equations obtained is,
Take the first and multiply it with
Use the method of elimination to solve the new first equation and third equation of system above.
Subtract both the equations,
Therefore,
Now substitute
Now substitute
Therefore, solution is the coordinate pair,
Thus, prices of oil change, a radiator flush and a brake pad replacement are
b.
To calculate: The amount of money spent for a radiator flush and a brake pad replacement.
b.

Answer to Problem 22PPS
The amount of money spent for a radiator flush and a brake pad replacementis
Explanation of Solution
Given information:
Price for oil change andreplacing radiator flush is
Calculation:
It is provided that Price for oil change andreplacing radiator flush is
Let price for oil change isx , replacing radiator flush be y and replacing brake pad be z .
Price for oil change andreplacing radiator flush is
Price for replacing brake pads and oil change is
Price for oil change, replacing radiator flush and brake pads is
The system of equations obtained is,
Take the first and multiply it with
Use the method of elimination to solve the new first equation and third equation of system above.
Subtract both the equations,
Therefore,
Now substitute
Now substitute
Therefore, solution is the coordinate pair,
Therefore, prices of oil change, a radiator flush and a brake pad replacement are
Add the price of brake pad and radiator flush together.
Thus, the amount of money spent for a radiator flush and a brake pad replacement is
Chapter 3 Solutions
Algebra 2
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