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
-------------------------------------------------------
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.
|
|
|
