Answer:
Aman's age = 20, Arun's age = 28
Step-by-step explanation:
Let  = Aman's age
 = Aman's age
Let  = Arun's age
 = Arun's age
- - - - 
 (Sum of their age is 56 after 4 years in the future)
 (Sum of their age is 56 after 4 years in the future)


 (Ages are in the ratio 5:7)
 (Ages are in the ratio 5:7)

Now, we can use substitution to find for Arun's age:
 
 



∴ Arun is 
To find for Aman's age, we can use substitution:



∴ Aman is 20
Hope this helps :)
 
        
             
        
        
        
Answer:
81
Step-by-step explanation:
The definition of a square is a four sided figure that has 2 sets of parallels lines, 4 congruent sides, and 4 right angles.  From that you can tell that one side of the square gives the measurement of all sides of the square.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Given


Required
Cost of c cheese and f topping pizza
Solving for c cheese pizza
If 1 cheese pizza costs $6,
c cheese pizza would cost $6 * c
Solving for f topping pizza
If 1 topping pizza costs $10,
f topping pizza would cost $10 * f
Hence:


<em>Hence, the total amount paid is: </em> <em></em>
<em></em>
 
        
             
        
        
        
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Answer:
7
Step-by-step explanation:
Set up an equation where x is the number
2x = 14
Divide by 2 on each side
x = 7
So, the number is 7.