Mathematics
surrencyamy
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Nick's telephone company charges $0.07 per minute for weekend calls and $0.08 per minute for calls made on weekdays. This month Nick was billed for 610 minutes. The charge for these minutes was. $48.05. How many minutes did he talk on weekends and how many minutes did he talk on​ weekdays?

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(1) Answers
Op16598

 So pretend weekend calls is x and weekday calls are y. the formulas is x + y = 610                         0.07x + 0.08y = 48.05 So, x = 610 - y Then, substitute x into the second equation. 0.07(610 - y) + 0.08y = 48.05  42.7 - 0.07y + 0.08y = 48.05                         0.01y = 5.35                                y = 535 Then substitute y into the first equation. x + 535 = 610           x = 75 Just to be sure, substitute x and y into the second equation. 0.07(75) + 0.08(535) = 48.05              5.25 + 42.80 = 48.05                         48.05 = 48.05 So, on weekends, he used 75 minutes. On weekdays, he used 535 minutes.

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