Answer:
a. x/y = 2          b) y/x +y =1/3    c) x-y/y= 1     d) y/x = 1/2
Step-by-step explanation:
Solve for  
a)	x/y
as we know x +y/y  = 3
  x+y= 3y  
x= 3y-y
x= y(3-1)
x/y= 3-1
x/y = 2
b)  y/x+y
as we know x +y/y  = 3
x+y = 3y
1= 3y/x+y
1/3 = y/x+y
So y/x +y =1/3
C) x-y /y
as we know x +y/y  = 3
x +y = 3y
subtracting 2y from both sides  
x +y -2y = 3y- 2y
x-y = y
dividing both sides by y
x-y/y = y/y
x-y/y= 1
d)	y/x
as we know x +y/y  = 3
x +y = 3y
x= 3y- y
x= 2y
dividing both sides by x
x/x = 2y/2x
1 = 2 x (y/x)
1 / 2 = y/x
Or y/x = 1/2
Best of luck. 
please mark me brainliest. 
 
        
             
        
        
        
Answer:
(4a+7)(4a-7)
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$425
Step-by-step explanation:
subtract 120 and 5 from his starting total to get how much he has after all his purchases. Then add 50 to that total to get your answer.
  
        
             
        
        
        
we know that
when you want to figure out a tip, you take your total bill and multiply it by the percentage you would like to tip them
so
15%=15/100------> 0.15
$63*0.15=$9.45
the answer is
$9.45
 
        
             
        
        
        
Answer:
C. 3
Step-by-step explanation:
This is a 30 60 90 triangle. To get from 3 rad 3 to x you need to divide rad 3 which gives you 3.