SOLUTION: Mary is certain that every time she parks in the municipal parking garage it cost her at least a $1.20. If the garage charges .40 cents plus .20 cents for each 1/2 hour, how long i

SOLUTION: Mary is certain that every time she parks in the municipal parking garage it cost her at least a $1.20. If the garage charges .40 cents plus .20 cents for each 1/2 hour, how long i

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Question 430347: Mary is certain that every time she parks in the municipal parking garage it cost her at least a $1.20. If the garage charges .40 cents plus .20 cents for each 1/2 hour, how long is Mary's car parked?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
If it costs $1.20 to park the car for X 1/2 hours, then:
$1.20=.40+.20X
.80=.20X
4=X
Therefore, Mary's car is parked for 4 half-hours, or 2 hours.
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