Question

An electric company charges a certain rate per kilowatt-hour (\text{kWh})(kWh) of electricity used and an administrative fee of \$3.50$3.50. The company charged Zhao \$63.25$63.25 for using 800\,\text{kWh}800kWh of electricity. Zhao uses the equation, 63.25=800r+3.5063.25=800r+3.50 to represent the situation. What does the variable rr represent in the equation? Choose 1 answer: Choose 1 answer: (Choice A) A The number of kilowatt-hours Zhao used (Choice B) B The charge per kilowatt-hour (Choice C) C The amount of the total charge that depends on the number of kilowatt-hours used

Answer 1

b

Explanation:

from khan

Answer 2

B. The charge per kilowatt-hour.

Explanation:

We have been given that an electric company charges a certain rate per kilowatt-hour of electricity used and an administrative fee of $3.50. The company charged Zhao $63.25 for using 800 kWh of electricity.

The equation
`63.25=800r+3.50` represents the total amount of bill charged by electricity comapany to Zhao for 800 kilowatts of electricity use.

Since total bill is $63.25, administrative fee is $3.50 and total use of electricity is 800 kilowatts, therefore, r represents the charge per kilowatt hour and option B is the correct choice.