Question

Mary bought 13 gallons of gas that cost $47.71. Each gallon of gas cost the same amount. Write an equation for this expression, specifying the cost and the number of gallons of gas.

A. Cost = 13 * x, Gallons of gas = 47.71
B. Cost = 47.71, Gallons of gas = x
C. Cost = 47.71, Gallons of gas = 13 * x
D. Cost = x, Gallons of gas = 13 * 47.71

Answer 1

The correct equation representing the cost and the number of gallons of gas purchased by Mary, who bought 13 gallons at a total cost of $47.71, is B. Cost = 47.71, Gallons of gas = x. This means that the total cost of $47.71 is for x gallons of gasoline. Correct option is C.

Step-by-step explanation:

The question is about determining the correct equation for the cost and the number of gallons of gas purchased. Mary bought 13 gallons of gas for a total of $47.71. This indicates that all gallons of gas cost the same amount. To find the cost per gallon, we would divide the total cost by the number of gallons.

So, the correct answer is B. Cost = 47.71, Gallons of gas = x. This signifies that the total cost of $47.71 is for x gallons of gasoline, where x is the number of gallons. We could also express the equation needed to find the cost per gallon of gas (c) as: c = Total Cost / Number of Gallons. This would translate to c = 47.71 / 13.