Jim pays $75 per month for a call phone plane plus $0.30 per minute beyond the first 1000 minutes. His bill was $105.60 last mon
th. How many minutes did he use
2 answers:
Answer: 1102 minutes
Explanation: Let x be the number of minutes Jim used 105.60 = 75 + 0.30 ( x − 1000 ) ⇒ 105.60 = 75 + 0.30 x − 300 ⇒ 105.60 = 0.30 x − 225
75 + 0.30x = 105.60
0.3x = 30.6
x = 102
1000 + 102 = 1102
Jim used 1102 minutes.
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