Answer:
31-19=12°F
12°F
Step-by-step explanation
If it was 19 degrees on Monday and 31 degrees on Tuesday you have to see how much did it go up in temp. So..
the difference between 19 and 31 is 12, so that means it went up by 12°F.
For this case we have that by definition, the point-slope equation of a line is given by:

Where:
m: It's the slope
It is a point through which the line passes
According to the statement data we have:

Substituting we have:

By law of signs of multiplication we have to:

Answer:
The requested equation is: 
(A) The customer that owns a 3-kW system exports 120 kWh monthly to the grid will have the following bills for both companies:
For ZG&E that collects $3 per kWh on a monthly basis, the monthly bill will be

For Ready Edison that collects $0.06 per kWh exported energy monthly, the computation of bill will be

(B) The customer that owns a 5-kW system exports 300 kWh monthly to the grid will have the following bills for both companies:
For ZG&E that collects $3 per kWh on a monthly basis, the monthly bill will be

For Ready Edison that collects $0.06 per kWh exported energy monthly, the computation of bill will be
Answer:
are there any word choices?
Step-by-step explanation:
16.33333 (just put a line over the 3 because it just keeps on going and thats what the line shows)