Question

Alex purchased a 6-hour calling card. He has used t minutes of access time. Write an algebraic expression to represent how many minutes he has remaining and identify the units for the expression.

Answer 1

The algebraic expression can be t=6h-m

Answer 2

`R = 360-t` minutes

Explanation:

Alex purchased a 6-hour calling card.

1 hour = 60 minutes

6 hour =
`60 * 6 = 360 minutes`

He used t minutes of access time.

let the remaining time be R

So, Remaining time =
`R = 360-t` minutes

The units for the expression is minutes.

Hence an algebraic expression to represent how many minutes he has remaining is
`R = 360-t` minutes