Certainly! Let's break down the problem step by step.
Mary paid a total amount of [tex]$130 to rent the boat. This total payment includes a flat fee plus the cost for the gasoline she used.
1. Identify the flat fee:
- Mary paid a $[/tex]100 flat fee.
2. Determine the total amount paid for gasoline:
- Subtract the flat fee from the total amount paid:
[tex]\[
\text{Total amount paid} - \text{Flat fee} = \text{Amount spent on gasoline}
\][/tex]
[tex]\[
130 - 100 = 30
\][/tex]
- So, Mary spent [tex]$30 on gasoline.
3. Calculate the cost per gallon:
- The cost for gasoline is $[/tex]3 per gallon.
4. Calculate the number of gallons used:
- Divide the amount spent on gasoline by the cost per gallon:
[tex]\[
\frac{\text{Amount spent on gasoline}}{\text{Cost per gallon}} = \text{Number of gallons used}
\][/tex]
[tex]\[
\frac{30}{3} = 10 \text{ gallons}
\][/tex]
Therefore, Mary used 10 gallons of gasoline.
The correct answer is (A) 10.
