contestada

When making a long distance call from a certain pay phone, the first three minutes of a call cost $1.65. after that, each additional minute or portion of a minute of that call costs $0.45. use an inequality to find the number of minutes one can call long distance for $7.95?

Respuesta :

ukichan
7.95-1.65=6.3$
6.3/0.45=14mins
14+3=17 minutes

Answer:

a ≤ 14 minutes

Explanation:

Given:

First three minutes costing = $1.65

After each minute Cost = $0.45

Assume Call after three minutes = a minute

Total amount = $7.95

Computation:

First three minutes costing + (Call after three minutes × each minute Cost) ≤ $7.95

$1.65 + ($0.45 × a) ≤ $7.95

$0.45 a ≤ $6.3

a ≤ 14 minutes

Therefore , They can call ≤ 14 minutes.