Question

A commuter has $245 in his commuter savings Account. This account changes by -$15 each week he buys a ticket.

A- if the account changes by -$240, for how many weeks of tickets did the commuter buy?

B- if the commuter wants to buy 20 weeks of tickets, how much must he add to his accoumt?

Answer 1

the account changes by -15 each week he buys a ticket....that means each ticket costs 15 bucks.

if the account changes by -240......240/15 = 16....so he bought 16 weeks of tickets

if he wants to buy 20 weeks....and the tickets cost 15 bucks...he would have to add (20 * 15) = 300 bucks.....thats if he doesn't have any in his account