# mathematics

A telephone company makes up its monthly bills as follows: a fixed charge of 800 naira plus a charge proportional to the number of units of call on the telephone .If it charge 2 naira per unit of call , calculate the total charges on (a) 80 units (b) 150 units (c) 782 units

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1. cost = 800 + 2u , where u the number of units of call

a) so if u = 80
cost = 800 + 2(80) = 800 + 160 = 960

b) if u = 150
......

c) if u = 782
...

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Reiny
2. THANKS

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