Problema Solution
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 $42.20 electric bill. (Use t to represent the kilowatt-hours over the initial 300.)
What is the equation?
Thanks for all your help!
Mark
Answer provided by our tutors
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 $49.35 electric bill. (Use x to represent the kilowatt-hours over the initial 300.)
Solution:
The equation is
0.08*30+0.13x = 49.35