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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.

The answer is a hope i

The principal, real, root of: 50−−√2=7.071067817.07106781−7.0710678150 is not a perfect square

X=-4 the correct answer