math correction

can someone correct this for me.Also do i have to solve it all the way or what does it mean by inequality form.

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 minutes a person could talk without exceeding $3.
Let x = be the number of minutes:
The first minute cost $0.36
The remaining x –1 minutes cost $0.21 each
So the remaining x- 1 minutes altogether costs $0.21 (x – 1)

Total cost = $0.36 + $0.21 (x – 1)

This must be less than or equal $3.00. So we have:
$0.36 +$0.21 (x- 1) <= $ 3.00
Multiply through by 100 and drop the $’s
36 + 21(x –1)<= 300
12 + 7 (x –1) <=100 (In this step in order to get this equation I had to divide both sides by 3 to make the numbers smaller.)
12 + 7x – 7 <= 100
7x + 5 <= 100

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  1. You already solved the answer...
    36 + 21(x –1)<= 300 is the answer to writing an inequality representing the number of minutes a person can make with 3 bucks.

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    posted by Kad
  2. i need help on correcting my work

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    posted by vanessa
  3. The melt in your mouth chocolate factor opens its doors each day at 7:00am sharp. Sally arrived at the factory 10 minutes before the door opened. Luke got their 18 minutes after sally, but 4 minutes before Michelle. At what time did Michelle arrive at the factory?

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    posted by cooi16
  4. write 5760 as a product of primes

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    posted by kyle
  5. 200 with radical sign is approximately 100

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  6. $443

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    posted by jessan
  7. The price of a wrist watch is$575.00 subject to 15% V.A.T
    calculatethe 50 percent fat on wrist watch.
    calculate the vat inclusive price of the wrist watch

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    posted by jessan

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