SOLUTION: {{{P=((50n-200)/n)+k}}} The profit P from a car wash is modeled by the equation above, where n is the number of cars and k is a constant. Which of the following expressions repr

Question 1043535:
The profit P from a car wash is modeled by the equation above, where n is the number of cars and k is a constant. Which of the following expressions represents n?
A)
B)
C)
D)
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
P = ( (50n -200) / n ) + k
:
P / 1 = ( (50n -200) + nk ) / n
:
cross multiply the fractions
:
nP = 50n - 200 + nk
:
nP -50n -nk = -200
:
nk +50n -nP = 200
:
n(k +50 -P) = 200
:
n = 200 / (k +50 -P)
:
********************
answer is C)
n = 200 / (k +50 -P)
********************
:

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