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# Rational number word problem: cab

CCSS.Math:

## Video transcript

Sandy is taking a cab in New York City. The taxi fare includes a base charge of \$2.50 as soon as you enter the cab, plus an additional \$2.50 per mile traveled. If Sandy starts off with a \$20 bill, takes the cab for five miles, and leaves a \$1 tip, how much money will she be left with? Well let's first just think about how much this five mile cab ride is going to cost her. So cab-- I'll call it the cab fare. So it's going to be \$2.50 just when you get into the cab, plus \$2.50 per mile. Well she's going to go for 5 miles-- let me write it this way-- times \$2.50 per miles. So the cab fare here is just going to be \$2.50, this \$2.50, plus 5 times \$2.50. Let's see, 5 times \$2.50, that is \$12.50. So this is plus \$12.50. \$2.50 plus \$12.50 is going to be \$15. So just the cab fare is going to be \$15. And then Sandy gives a \$1 tip. So fare plus tip is going to be equal to the cab fare \$15 plus \$1 which is equal to \$16. So then answering the question, how much money would she be left with with a \$20 bill? Well we could write her change is going to be, she's going to give a \$20 bill, the fare plus tip is \$16, minus \$16. So she's going to have \$4 left in change.