Question

When making a long distance call from a certain pay phone, the first three minutes of a call costs $2.75. After that, each additional minute or portion of a minute of the call cost $0.25. Use an inequality to find the number of minutes one can call long distance for $6.00.

Answer 1

16 min max

Explanation:

The first 3 min cost $2.75

Then $0.25 per min

Max allowed amount $6.00

For total of x min call the inequality:

• 2.75+(x-3)*0.25≤6
• 0.25x +2.75-0.75≤6
• 0.25x ≤ 6-2
• 0.25x ≤4
• x≤4/0.25
• x≤16

16 mins max

Answer 2

16 mins

Explanation:

Please see attached picture for full solution