an electrical company supplies electricity to residential customers for a monthly customer charge of $6.22 plus 7.378 cents per kilowatt-hour for up to 400 hours
write a linear equation that relates the monthly charge C in dollars to the number x of the kilowatt-hours in a month

Question

an electrical company supplies electricity to residential customers for a monthly customer charge of $6.22 plus 7.378 cents per kilowatt-hour for up to 400 hours
write a linear equation that relates the monthly charge C in dollars to the number x of the kilowatt-hours in a month

anonymous · Answer

$$C=6.22+7.378 x$$

radar · Answer

C=6.22+.07378x  In order to keep it in dollars

radar · Answer

Don't know how to insure keeping it less than 400 hours though.

anonymous · Answer

its fine so if they ask for 200 kilowatts ill just plug that into x

radar · Answer

Does the rate go down after 400?

anonymous · Answer

radar is correct.$$C==6.22+\frac{7.378 x}{100} $$

radar · Answer

@robtobey, Good to hear from you, hope things are going well in sunny CA

anonymous · Answer

can u help me with this question
find the equation of a line that is perpendicular to the line x=-13 and contains point (3,2)

radar · Answer

Yes, that line is a vertical line x=-13 so a perpendicular line would be a horizontal line at y=2.  Thats it , all there is   y=2

anonymous · Answer

i have a really big question do you have time to help me

radar · Answer

It would be better to repost that big question.  I am getting  lunch.  And besides, others will want to help.