Bismuth83
A taxi service charges a base fare of $5, and a rate of $M per mile for the first 10 miles. Thereafter the rate is $0.5M per mile. There is also a charge of $3 per suitcase. Students traveling from and to the local college get a twenty percent discount on the mileage rates. A is a teacher traveling a distance of 8 miles with one suitcase. B is a student traveling 30 miles with two suitcases from the college to the station.
Select the expression for the difference between the amounts paid by A and B in dollars, and for the amount paid by A in dollars.
Given rates
Base fare $5
For the
first 10 miles $ M per mile
For every
additional mile after first 10 miles = $0.5M per mile.
Per suitcase rate = $3
Teachers
DONOT get discount in mileage rates
Students GET
DISCOUNT IN MILEAGE RATES ONLY.
TEACHER travels for 8 miles with 1 suitcase.
Teacher rate = Base fare + mileage fare for 8 miles + per suitcase fare = $5 + 8* $M + $3
= 8 + 8M
=
8 ( 1+ M) Student travels for 30 miles with 2 suitcases in hand.
Student rate
=
base fare + mileage rate for first 10 miles + mileage rate for the next 20 miles + 2* per suitcase rate .
= 5 + 10M + 20* 0.5 M + 2*3
= 11 + 20 M
They have given a discount of 20% on mileage rates only.
= 11 + 80/100 * 20 M
= 11 + 16 M
DIFFERENCE BETWEEN STUDENT RATE AND TEACHER RATE = 11 + 16 M - ( 8 + 8M )
=
8M + 3