Answer:

Step-by-step explanation:
Let
C(t) ---->the total cost of the electrician's services in dollars
t ---> the number of hours
we know that
The linear function in slope intercept form is equal to

where
m is the slope or unit rate
b is the y-intercept or initial value
In this problem we have
the y-intercept is equal to
----> set fee
we have the ordered pair (2,250)
substitute the given values

Solve for m



The linear function is equal to

<u>Answer:</u>
- The weight after 20 months is 210 kilos.
<u>Step-by-step explanation:</u>
- 1 month = 6 kilos
- => 8 months = 6 x 8 = 48 kilos
- => x + 48 = 138
- => x = 90
<u>This means that the starting point is 90 kilos.</u>
- => 1 month = 6 kilos
- => 20 months = 6 x 20 kilos
- => 20 months = 120 kilos
- => 90 + 120 = weight in 20 months
- => <u>210 kilos = weight in 20 months</u>
Hence,<u> the weight after 20 months is 210 kilos.</u>
Hoped this helped.

Answer:2nd one
Step-by-step explanation: