Answer:
see explanation
Step-by-step explanation:
(a)
 = 1 ( any value divided by itself = 1 )
 = 1 ( any value divided by itself = 1 )
(b)
 = a ( any value divide by 1 is the value itself )
 = a ( any value divide by 1 is the value itself )
(c)
 ×
 ×  =
 = 
The product of 2 fractions is the product of the numerators divided by the product of the denominators
(d)
 ÷
 ÷  =
 = 
To divide 2 fractions, leave the first fraction, change division to multiplication and turn the second fraction upside down, that is
 ÷
 ÷  =
 =  ×
 ×  =
 = 
(e)
 +
 +  =
 = 
Since the fractions have a like denominator, add the numerators leaving the denominator. This applies to subtraction also
(f)
 -
 -  =
 = 
See explanation for part (e)
 
        
             
        
        
        
Answer:
No solution
Step-by-step explanation:
=> y+3 = y+9
<u><em>Subtracting both sides by y</em></u>
=> 
=> 3 ≠ 9
So, This equation has no solution.
 
        
             
        
        
        
Answer:
320 meters
Step-by-step explanation:
x² + 200x = 166400
It's a square, area should be side²
x² + 2(x)(100) = 166400
x² + 2(x)(100) + 100² = 166400 + 100²
(x + 100)² = 176400
x + 100 = 420
Since these are sides, we just consider the positive square root 
x + 100 = 420
x = 320m
 
        
             
        
        
        
Answer:
I believe it is 54.40$ 
Step-by-step explanation:
I think weird. so
68 divided by 5 which will give you 20%(13.6) then multiply by 4 which is 80%(54.4)
 
        
             
        
        
        
an equation for a circle has formula
(x-m)² + (y-n)² = r²
where (m,n) is its center
and r is its radius
so, the equation has center (4,3) and radius 4
the equation is derived from the pythagorean theorem