Gasoline cost $3.28 per gallon. it took 16.5 gallons to fill steve’s gas tank. how much did the gasoline cost?

C. expression because any expression or equation may contain more than one variable

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.