Mathematics, 30.10.2020 17:00, lanaiheart7

Suppose a 5-mintue overseas call costs 6.45 and a 10-minute calls costs 11.40. The cost of a call and the length of a call care related. Write an equation to show the cost of a call for any duration. Approximately how long can you talk on the phone if you have $51 to spend?

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Suppose a 5-mintue overseas call costs 6.45 and a 10-minute calls costs 11.40. The cost of a call an...