For his long distance phone service, Tom pays an 8$ monthly fee plus 6 cents per minute. Last month, Tom's long distance bill was 17.54 . For how many minutes was Tom billed?

Question

For his long distance phone service, Tom pays an  8$ monthly fee plus 6 cents per minute. Last month, Tom's long distance bill was 17.54 . For how many minutes was Tom billed?

anonymous · Answer

first subtract the base fee as that will be charged regardless

anonymous · Answer

then with what's left divide by the minute rate and bang you're done

anonymous · Answer

Remember how we did the last one?
he HAS to pay 8. 
so 8 + 0.06x=17.54
subtract 8
11.54
divide by 0.06 :)

anonymous · Answer

Maya purchased a prepaid phone card for 15 . Long distance calls cost 24  cents a minute using this card. Maya used her card only once to make a long distance call. If the remaining credit on her card is 10.68 , how many minutes did her call last?

anonymous · Answer

you can try these on your own! You can do it!

this one is subtraction.

cost of the prepaid card - .24 x =10.68 .