Lena purchased a prepaid phone card for $20. long distance calls cost 21 cents a minute using this card, lena used her card only once to make a long distance
call. if the remaining credit on her card is $12.23, how many minutes did her call last?

37 minutes

Step-by-step explanation:

Lena has 20 dollars. 20 - 12.23 = 7.77

Lena has $7.77 dollars left.

We divide this by .21 to see how many minutes her call was.

7.77 ÷ .21 = 37

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there are two angles that are alternate interior angle with angle 9

the angle 15 and angle 7 are alternate interior angle with angle 9.

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answer:   2 multiplied by x =24

step-by-step explanation: