Question

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?

Answer 1

Answer: 8 hours

Step-by-step explanation:

Given : The cost "c" (in dollars) of renting a paddle board for "h" hours is given by $c=25+7h$

Now, put the value of c= 81 in the given equation, then we have

$81=25+7h$

Subtract 25 on both sides , we get

$7h=81-25\\\\\Rightarrow\ 7h=56$

Now, divide 7 on the both sides , we get

$h=8$

Hence, the number of hours for the cost of $81 = 8

Answer 2

C = 25 + 7h...c = 81
81 = 25 + 7h
81 - 25 = 7h
56 = 7h
56/7 = h
8 = h......so at 8 hrs, it will cost $ 81