Which is a unit rate?
4 dollars
3 cans
5 students
2 teachers
6 hours : 1 book
3 miles : 2 days

the last 2 are a unit rate

Step-by-step explanation: A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity.

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !