7/5 = 14/10 = 28/20
Numerator = x
Denominator = x-4
Add 3 to both:
x +3 / (x-4+3)
x+3 = 14
(x-4 +3) = 10 = x-1 = 10
x = 11
Check:
11 -4 = 7 ( denominator is 4 less than the numerator.)
add 3 to both:
11+3 = 14
7+3 = 10
14/10 reduces to 7/5
The original fraction would be 11/7
 
        
             
        
        
        
Answer:

⇒ 
        [Factorized form]
Step-by-step explanation:
Given expression:

We need to make 
 the subject.
In order to do that we need to solve the expression for 
 in terms of 
 and 
We have,

Subtracting both sides by 


Taking square root both sides in order to remove square of 


The difference of squares can be factorized and written  as:
    [difference of squares 
 ]
 
        
             
        
        
        
Answer:
k(-1) = 7.
Step-by-step explanation:
k(-1) is the value of the function k when x = -1.
You read this off the graph.
Find the value of the point  on the graph which corresponds to x = -1.  From x = -1 on the horizontal axis move straight up until you meet the graph of k. Now look horizontally to the right  and read off the value on the vertical
  y-axis 
You'll find it is 7.
 
        
             
        
        
        
5. 90 + 54 = 144 flowers
6. 250 - 106 = 144 balls