An electric company charges a $40 monthly fee plus a usage fee $0.02 per kilowatt hour. A 7% tax is added to each bill.

Question

write an Equation and solve if you ran electricity  for 40 hours

Answer 1

Equation in general form for any arbitrary usage KWH (kilowatt-hours) could be written as:

AMT = 1.07 x (40 + KWH x 0.02)

 

Assuming electricity usage KWH = 40 per month, the equation for the total amount AMT could be written as follows:

 

AMT = 1.07 x (40 + 40 x 0.02) = $43.66

 

Note: the problem definition seems incomplete - it states just 40 hours without specifying the power consumption (KW). The solution is given on the assumption of 40 kilowatt-hours (KWH)