Mathematics, 25.12.2019 04:31 admiralaj85

Ricki has a prepaid cellphone. last week ricki made 4 call and sent 20 text messages which cost him $4. this week he made 10 calls and sent 5 text messages which cost him $5.50. write a system describing the number of calls, c, and the number of text messages, t, that ricki made over the past two weeks

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Ricki has a prepaid cellphone. last week ricki made 4 call and sent 20 text messages which cost him...