Step-by-step explanation:
The equation is given by :
63.25=800r+3.50
Here,
63.25 is the electric company charges
3.5 is an administrative fee
800 is charge per kilowatt hours
r is rate per kilowatt hour
In this proble, we need to tell that what does r represents. Hence, r shows kilowatt per hour.
We can solve it as follows :
63.25-3.5=800r+3.50-3.50 (Subtracting 3.50 to the both sides)
59.75=800r
![r=\dfrac{59.75}{800}\\\\r=0.0746](https://tex.z-dn.net/?f=r%3D%5Cdfrac%7B59.75%7D%7B800%7D%5C%5C%5C%5Cr%3D0.0746)
It adds 3 each time so the nth term is 3n
Minus 3 from 2 to get 0th term
So 3n-1 substitute 50 for n
150-1 is 149
The slope is 2/5, y-intercept is -6
so
m=2/5, b=-6 :)
Answer:
7.8%
Step-by-step explanation:
Yesterday’s price =$3.20
Today’s price =$3.45
Increase =today’s price - yesterday’s price
That’s $3.45 - $3.20
= $0.25
Percentage increase = increment /yesterday’s price x 100%
That’s $0.25/$3.20 x 100%
0.0781 x 100%
7.81
7.8%