SOLUTION: The carnival charges $7 for admission and $2 for every book of ride tickets. Write the equation that would describe how many books of tickets you can buy for $25. Use "b" for the

Question 896244: The carnival charges $7 for admission and $2 for every book of ride tickets. Write the equation that would describe how many books of tickets you can buy for $25. Use "b" for the number of books and DO NOT use spaces.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
The $7 is the fixed cost. It does not change based on how many tickets you buy.

The $2 is known as the variable cost. It changes based on how many ticket books you buy.

Let b = number of ticket books bought

If it costs $7 to get in the door, and $2 per book, then it costs 7 + 2b or 2b + 7 dollars total. This is the sum of the fixed cost and variable cost.

This total cost is equal to $25 because this is how much you have in your pocket.

So the equation is 2b + 7 = 25

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If you want to solve for b, then...

2b + 7 = 25

2b + 7-7 = 25-7

2b + 0 = 18

2b = 18

2b/2 = 18/2

b = 9

Therefore, you can buy 9 books with $25. If you only want the equation, then ignore this portion. However, it is useful to know how solve equations.
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