Solve the problem. See Example 1.If 6 gal of premium gasoline cost $22.74, how much would...
Solve the problem. See Example 1.
If 6 gal of premium gasoline cost $22.74, how much would it cost to completely fill a 15-gal tank?
EXAMPLE 1 Applying Proportions
After Lee Ann Spahr pumped 5.0 gal of gasoline, the display showing the price read $23.20. When she finished pumping the gasoline, the price display read $67.28. How many gallons did she pump? To solve this problem, set up a proportion, with prices in the numerators and gallons in the denominators. Let x = the number of gallons pumped.
She pumped a total of 14.5 gal. Check this answer. Notice that the way the proportion was set up uses the fact that the unit price is the same, no matter how many gallons are purchased.
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