For his long distance phone service, Keith pays a $3 monthly fee plus 11 cents per minute. Last month, Keith’s long distance

For his long distance phone service, Keith pays a $3 monthly fee plus 11 cents per minute. Last month, Keith's long distance bill was $16.42. For how many minutes was Keith billed?​

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  1. Step-by-step explanation:

    First, subtract 3 from 13.67 so we can find out the minutes only and not the minutes along with the monthly bill.

    This will come out to be 10.67

    Now, we will divide 10.67 by .11

              This will come out to be 97.

    This means he was billed for 97 minutes on the phone

    Hope I helped!

    Please tell me if this is wrong and my most sincere apologies if it is.

  2. 122 Minutes

    Step-by-step explanation:

    Start with $16.42

    subtract $3 for the monthly fee, 16.42-3= $13.42

    he pays $0.11 per minute so that's 13.42 x (1min/0.11) = 122minutes

  3. The number of minutes for which Keith was billed = 97

    Step-by-step explanation:

    Step 1:

    It is given that Keith pays a fixed fee of 3$ a month and 11 cents per minute  for the number of minutes used.

    Total cost = Fixed cost + Per minute cost

    If x represents the number of minutes consumed in a month then we can compute the total cost using the below equation:

    Total cost = 3$ + 0.11 * x

    Step 2:

    The total cost is 13.67$

    Substituting in the equation we get

    13.67 = 3 + 0.11 * x

    x = 10.67 / 0.11 = 97 minutes

    Step 3:

    The number of minutes for which Keith was billed = 97

  4. He was billed for 97 minutes.

    Step-by-step explanation:

    Knowing that Keith's plan has a $3 base fee and takes 11 cents per minute, we  can start by removing the $3 from the equation since we are looking for the amount of minutes he was billed for.

    $3 + $0.11x = $13.67 ---> $3 (-$3) + $0.11x = $13.67 (-$3)

    ---> $0.11x = $10.67

    Next, divide both sides by 0.11.

    $0.11x = $10.67 ---> $0.11x ÷(0.11) = $10.67 ÷(0.11) ---> x=97

    Keith used his long distance phone service for 97 minutes.

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