Concept explainers
To calculate: To write an equation that could be used to find the unit cost of a gallon of gas. Then find the unit cost.
Answer to Problem 46SR
Equation to find the unit cost of a gallon of gas is
Unit cost of a gallon of gas is
Explanation of Solution
Given information: The cost of gas varies directly with the number of gallons bought. Marty bought
Calculation:
Let the cost of
Thus, equation to find the unit cost of a gallon of gas is calculated as follows:
Substituting the values in above equation to get the unit cost
Hence, equation is
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