02-09-2018
Mathematics

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A mobile phone company uses the formula C = 10t + 20m to calculate the total cost of a bill. C is the total cost of the bill in pence. t is the number of text messages. m is the number of minutes of call time. Calculate the total cost for 150 texts and 50 minutes of call time.

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02-09-2018

Total Cost C = 10*150 + 20*50

= 2500 pence

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