Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 4 - An Introduction to Functions - 4-7 Sequences and Functions - Practice and Problem-Solving Exercises - Page 278: 37

Answer

1. The explicit formula is A(n)=46.75-3.25(n-1) 2. After 12 lunches, the card has $11

Work Step by Step

1. The explicit formula is A(n)=46.75-3.25(n-1) because every time you buy lunch, the amount of money on the card decreases by 3.25 dollars and therefore the money in the card is decreasing by 3.25. Also the first term in the sequence is 46.75 because A(1) is 46.75 which is the amount money in the card after buying one lunch as the card had 50 dollars before any transaction. 2. After 12 lunches, the card has $11. To solve this we will plug in n=12 in A(12)=46.75-3.25(12-1)=46.75-3.25(11)= 46.75-35.75= 11
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.