SOLUTION: Some students held a car wash. They charged $3 to wash each car. The students made a profit of $330 after they spent $15 on supplies for the cash wash. How many cars did they wash?

Question 818945: Some students held a car wash. They charged $3 to wash each car. The students made a profit of $330 after they spent $15 on supplies for the cash wash. How many cars did they wash?

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
profit equation:
p = r - c
---
r = 3n
c = 15
p = 3n - 15
---
330 = 3n - 15
3n = 345
---
n = 115 cars
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
RELATED QUESTIONS
Some students held a car wash. They charged $3 to wash each car. The students made a... (answered by josmiceli)

Members of the senior class held a car wash to raise funds for their prom. They charged 5 (answered by josmiceli)

The Girls Soccer team held a fundraising car wash. They charged 5$ for each car and 8$... (answered by sn394018)

The Girls Soccer team held a fundraising car wash. They charged 5$ of each car and 8$ for (answered by greenestamps,MathTherapy)

Members of a senior class held a car wash to raise funds for thier senior prom. They... (answered by solver91311)

A group of students held a car wash to raise money. They charged $9 for each car and $12... (answered by richwmiller)

A group of students held a car wash to raise money. They charged $9 for each car and $12 (answered by josmiceli)

Solving Problems Using Linear Systems 3. The girls' soccer team held a fundraising car... (answered by stanbon)

the outdoors club held a car wash to raise money they washed cars for 5$ each and vans... (answered by stanbon)