Which pair of terms are like terms?

a, 5y and 5yw
b, -2y and 4y
c, 2.4xy and 3x
d, 7ab and 3b

B, -2y and 4y because they have the same 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.