Answer:
Step-by-step explanation:
In order to do this we need to isolate y by performing the inverse operations on the other values like so...
a)   10x + 5y = 20   ... subtract 10x on both sides
      5y = 20 - 10x    ... divide both sides by 5
        y = 4 - 2x   ... we can move the 2x to the right to make it into y = mx + b
        y = -2x + 4
b)   3x - 2y = 10 + 4x   ... subtract 3x on both sides
       -2y = 10 + x    ... divide both sides by -2
        y = -5 - 0.5x  ... move -0.5 to the left so it matches y = mx + b
        y = -0.5x - 5
 
        
             
        
        
        
In this question, the given functions are
And we have to find the value of
Which is equal to
So we have to subtract the two functions that is
Correct option is the second option .
This is wrong DONT use it
        
                    
             
        
        
        
Answer:
  682
Step-by-step explanation:
620, percentage decreased by - 10% (percent) of its value = 682
 
        
             
        
        
        
Answer:
69.08
Step-by-step explanation:
round from 69.115