Susan drove 1500 miles to daytona beach for spring break. on the way back she averaged 10 miles per hour less, and the drive back took her 5 hours longer . find susan's average speed on the way to daytona beach.

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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.