MATH

posted by .

This problem makes no sence to me i tried it but i know i am completely wrong someone please help.

The cost for a long-distance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3.

my answer and solving way:
.36x+.21 = 3
-.21 .21
.36x = 2.79
---- ----
.36 .36

x = 7.75

i think o.36+0.21x=3.00
so 0.21x=2.64. then you just find x

let he talks for X minutes
out of this 1 minute is @ 0.36$/min
and (X-1) minutes @ 0.21$/min
therefore
=> 0.36+0.21(X-1)<=3.0
=> 0.36+0.21X-0.21 <=3.0
=> 0.15+0.21X <=3.0
=> 0.21X <=2.85
=> X <= ( 2.85/0.21 )
=> X <14 minutes
precisely X= 13.57 minutes

Let x = number of minutes.
0.21 x + 0.36 = 3.00
0.21 (x-1) = 2.64
x = 13.57 minutes IF the person were charged for the unused part of the last minute. However, the caller would be charged for 1 + 13 minutes, or $3.09. That exceeds the $3 limit, so talking would actually have to stop at 13 minutes, when the charge would be $2.88.

I am having a little trouble with maths because It is really hard 8-)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math correction

    can someone correct this for me. Business and finance. The cost for a long-distance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion thereof. Write an inequality representing the number of …
  2. math

    The cost of a long-distance telephone call is $.36 for the first minute and $.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3. cost= …
  3. algebra

    The cost for a long-distance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3. Well, …
  4. math

    write and evaluate an expression for the total cost of a 17 minute long distance phone call. .99 for the first minute and .10 for each additional minute.
  5. math

    lisa made a long-distance telephone call to her friend Jane. the cost was $.42 for the fist minute and $.19 for each additional minute. what was the total length of the call if it cost $2.89
  6. math

    At TelePower Plus, long-distance phone calls to China cost $0.59 for the first minute and $0.25 for each additional minute, plus an additional roaming charge of $2.50. If the total charge of a call to Beijing was $11.84, how many minutes …
  7. math

    8. At TelePower Plus, long-distance phone calls to China cost $0.59 for the first minute and $0.25 for each additional minute, plus an additional roaming charge of $2.50. If the total charge of a call to Beijing was $11.84, how many …
  8. math

    Telephone company A charges $3.00 for the first minute of any long distance call and $0.50 for each additional minute. Telephone company B charges $2.00 for the first minute of any long distance call and $0.70 for each additional minute. …
  9. algebra

    a long distance call costs .50 for the first minute, and then .9 for each additional minute. If the call lasted 10 minutes, how much did the call cost in cents?
  10. Algebra

    A long-distance telephone call cost $.20 for the first 10 minutes plus $.10 for each additional minute. How much should you expect to pay for a call that was 26,457 seconds?

More Similar Questions