SOLUTION: Heather is a cashier. She can ring up 12 customers in 9 minutes. At this rate, how many minutes does it take her to ring up 4 customers?

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Question 1133837: Heather is a cashier. She can ring up 12 customers in 9 minutes.
At this rate, how many minutes does it take her to ring up 4 customers?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
12 c/9 min =4 c/x min
cross-multiply and 12x=36 and x=3 minutes
she can do 1 1/3 customers per minute is another way to do this.