Answer:
see below
Step-by-step explanation:
We can use point slope form
y - y1 = m(x-x1)
where m is the slope and ( x1,y1) is a point on the line
y-12 = 3(x-12)
If we want it in slope intercept form
Distribute
y-12 = 3x-36
Add 12 to each side
y-12+12 = 3x-36+12
y = 3x-24
 
        
             
        
        
        
   2
X  - 4 when you use the foil method or multiplication
        
                    
             
        
        
        
You would have to mow 9 lawns
        
                    
             
        
        
        
Shopping... 
there is a sale on a shirt for 1/3 off, but the shirt costs 5 dollars. You would then need to convert the fraction to a decimal to find the percentage you would get off of the original price.