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For a long distance person to person telephone call a telephone company charges 0.91 for the first minute 0.58 for each additional minute and 2.74 a service charge. If the cost of a call is 5.39 how long did the person talk

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RiskeMauri

If the cost of a call is 5.39, obviously this person stayed more than one minute at the telephone. It will pay for:

  • 2.74 for service charge;
  • 0.91 for the first minute;
  • x for the additional minutes.

If we will find out the value of x, we will know how much time this person paid for additional minutes. Let's make some subtractions:

  • The total minus the service charge: [tex]5.39-2.74=2.65[/tex];

  • 2.65 minus the first minute: [tex]2.65-0.91=1.74[/tex]

So, this person paid 1.74 by additional minutes. Let's divide this value by the price for additional minute:

[tex]\frac{1.74}{0.58} =3[/tex]

This means that it paid by 3 minutes additional.

Therefore, this people stayed at telephone by 3 + 1 = 4 minutes.

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