Question

Chloe makes a long distance call from a pay phone, the first minute of a call cost $2.30. After that, each additional minute is $0.20. How many minutes can Chloe talk for $4.30?

Answer 1

The number of minutes is 10minutes

Explanation:

Step one:

Given that the first minute of a call cost $2.30 and

each additional minute is $0.20.

let the number of minutes be x

and the total cost be y

the total cost for the situation is modeled as

y=mx+c-----equation of a line

Step two:

given that y=4.3, we can solve for the totals cost as

by substituting we have

4.3=0.2x+2.3

4.3-2.3=0.2x

2=0.2x

x=2/0.2

x=10

The number of minutes is 10minutes