Question

To train for a marathon, Lily plans on running 4 miles per day for the first week and then increasing that daily distance by 1 mile each of the following weeks.

Which of these equations represent the problem.

Answer 1

The equation which represent the problem is given by an = 4 + 1.00(n - 1)

How to write equation?

Number if miles Lily run per day first week = 4 miles

Additional miles per day each week = 1 mile

let

n = total miles

The equation:

an = 4 + 1.00(n - 1)

• When n = week 2

an = 4 + 1(n - 1)

= 4 + 1(2 - 1)

= 4 + 1(1)

= 4 + 1

= 5 miles

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