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The cost c (in dollars) of renting a paddle board for (h) hours is given by c=25+7h. After how many hours is the cost $81?
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The cost c (in dollars) of renting a paddle board for (h) hours is given by c=25+7h. After how many hours is the cost $81?

User Kapol
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2 Answers

6 votes
c=25+7h
SUBSTITUTE C=81
81=25+7h
81 DIVIDED BY 25=3.24
3.24=7h
h=3.24 divided by 7
H=0.4628 Hours
=27.7 minutes
User Grijesh Chauhan
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8.0k points
4 votes
Renting the paddle board for 8 hours would cost $81. Plug in 81 for c and solve.
User Sico
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9.1k points
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