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Sauron [17]
3 years ago
7

The credit remaining on a phone card is a linear function of the total calling time made with the card. The remaining credit aft

er 45 minutes of calls is $14.60, and the remaining credit after 67 minutes of calls is $11.96. What is the remaining credit after 81 minutes of calls
Mathematics
1 answer:
dolphi86 [110]3 years ago
5 0

If you need the answer so go to the google and search for problem

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( 6 − 7 i ) ( − 8 + 3 i )

First FOIL:

( 6 − 7 i ) ( − 8 + 3 i )  = -48 + 18i + 56i -21i^2

Combine like terms

                                 = -48 + 74i -21i^2

Convert i^2 = -1

                                 = -48 + 74i -21(-1)

And simplify

                                 = -48 + 74i + 21

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