Michael and minnie are gathering coats for a coat-drive at their school. minnie gathers 3 times as many coats as michael and together they have 52 coats. how many coats did michael contribute? a) 13 b) 15 c) 39 d) 41

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.