Question

Elia is training for her first marathon. She currently runs 10 miles per week, and wants to increase her mileage by 2 mi every

week. If Elia keeps to her training schedule, write a formula to define the number of miles she runs each week

a_n = 2n+8

a_n = -2n+2

a_n = 2n+10

a_n = -2n+12

Answer 1

The formula to define the number of miles Elia runs each week is a_n = 2n + 8.

Step-by-step explanation:

The formula to define the number of miles Elia runs each week can be expressed as:

an = 2n + 8

Where an represents the number of miles Elia runs in the n-th week.

The formula indicates that Elia starts with 8 miles in the first week (when n = 1), and then adds 2 miles for each subsequent week.