SOLUTION: 1. The cost of electricity in a certain city is $0.08 for each of the first 300 kWh (kilowatt-hours) and $0.13 for each kWh over 300 kWh. Write an equation to find the number of ki

Question 646833: 1. The cost of electricity in a certain city is $0.08 for each of the first 300 kWh (kilowatt-hours) and $0.13 for each kWh over 300 kWh. Write an equation to find the number of kilowatt-hours used by a family that receives a $43.50 electric bill. (Use x to represent the kilowatt-hours over the initial 300.)
1

Find the number of kilowatt-hours used by the family?
kWh

2. Translate into an equation and solve. (Use n to represent the smaller number.)
The sum of two numbers is twenty-four. Six less than five times the smaller is equal to the larger.
1

Find the numbers.
2 (smaller number)
3 (larger number
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi, Previously Posted

1.

 .08*300 = $24

 $24 + .13x = 43.50

       .13x = 19.50

          x = 150kWh 

total kilowatt-hours  is 450kWh 

2.

 (smaller number) n

 (larger number) (24-n)

 5n - 6 = 24-n

   6n = 30

    n = 5, the smaller number.  the larger is 19 

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