<h2>Just some examples...</h2>
2z+4=12
2(4)+4=12
<em>8+4=12</em>
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5z*2=40
5(4)*2=40
<em>20*2=40</em>
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Answer:
-4.67
Step-by-step explanation:
first find f^-1(x)
let f(x)=y
y=3x+2
3x=y-2
x=y-2/3
Therefore f^-1(x)=x-2/3
Now f^-1(-12)=-12-2/3
=-14/3
=-4.67
 
        
             
        
        
        
(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 
 
 
        
             
        
        
        
The percent of change is 73.33 percent
        
             
        
        
        
The numbers they are looking for are numbers that are simple but made up. For example, start with 0. Plug 0 in for x, so the corresponding value of y is 10. For a second value, you could do 2. When x=2, y=11, etc. So essentially, put in some simple numbers for x, and solve for y. :)