Answer:
   $1025
Step-by-step explanation:
We can use the 2-point form of the equation of a line to write a function that gives Justin's salary as a function of his sales.
We start with (sales, salary) = (400, 500) and (700, 575)
__
The 2-point form of the equation of a line is ...
   y = (y2 -y1)/(x2 -x1)(x -x1) +y1
   salary = (575 -500)/(700 -400)(sales -400) +500
   salary = 75/300(sales -400) +500
For sales of 2500, this will be ...
   salary = (1/4)(2500 -400) +500 = (2100/4) +500 = 1025
Justin's salary after selling $2500 in merchandise is $1025.
 
        
             
        
        
        
Solve for y by setting one equation =to X after that you can substitute the equation into the other one let's set the first one in X= FORM
X-7y=10
-2x+14y=-20
Add 7y to both sides of the first equation to let x stand alone
X=7y+10
Now you can substitute x on the second equation 
-2 (7y+10)+14y=-20
Distribute 
-14y-20+14y=-20
Add and simplify 
Us cancel out =0 
-20=-20
0=0
They are the same equations you can also divide the second equation by -2 which would make it look like this
X-7y=10
-2 (x-7y=10) 
Let me know if I have answered your question
        
             
        
        
        
Answer:
y=x
Step-by-step explanation:
one type of coordinate cant = another
 
        
             
        
        
        
2i+5=1250. You subtract 5 from 1250 then divide 2 from whatever you get from the 5-1250
        
             
        
        
        
Its a , i had it yesterday and i got everything right dont worry :))