Mathematics: Susan purchased a prepaid phone card for $ 20 . long distance calls cost 23 cents a minute using this card. susan used her card only once to make a long distance call. if the remaining credit on her card is $ 13.79 , how many minutes did her call last?

Susan purchased a prepaid phone card for $ 20

Ответ:

morgeron6071

28.05.2020

27 minutes long because 23 multiplied by 27 is 621 and 20 subtracted by 13.79 is 6.21 and u have to find how much cents add up to that

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Ответ:

alejandra340

23.09.2022

Mathematics

$\frac{ \frac{1}{9} }{ \frac{9}{6} } 
$
You transform it to a multiplication by multiplying the first term (in this case 1/9) by the inverse of the second term (which is in this case 9/6, his inverse is 6/9)
so we get
$\frac{1}{9}* \frac{6}{9} 
 \frac{6}{81}$
then you divide each number by 3, So we get
$\frac{2}{27}$
Hope this Helps :)

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Susan purchased a prepaid phone card for $ 20 . long distance calls cost 23 cents a minute using this card. susan used her card only once to make a long distance call. if the remaining credit on her card is $ 13.79 , how many minutes did her call last?

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