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Mathematics, 25.06.2019 05:40 sierracupcake0220
Bryan's monthly electric bill is determined by adding a flat administration fee to the product of the number of kilowatthours of electricity used and the cost per kilowatt hour. when he uses 1,100 kilowatt hours of electricity, his bill is$113. when he uses 1,500 kilowatt hours of electricity, his bill is $153. what is the monthly administration fee?
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