Question

Alexa borrowed some money from her friend in order to help buy a new video game system. Alexa agreed to pay back her friend $10 per week and originally borrowed $170. Write an equation for L,L, in terms of t,t, representing the amount Alexa owes her friend after tt weeks.

Answer 1

Answer:

$L(t) = 170 - 10t$

Step-by-step explanation:

The amount that Alexa owes after t weeks is given by a linear equation in the following format:

$L(t) = L(0) - bt$

In which L(0) is the initial amount borrowed and b is how much is paid per week.

Alexa agreed to pay back her friend $10 per week and originally borrowed $170.

This means that, respectivelly, $b = 10, L(0) = 170$. So

$L(t) = L(0) - bt$

$L(t) = 170 - 10t$