Answer:
The number of once is 9.1  
The number of hundreds is 8.9
Step-by-step explanation:
Given as :
The total of digits having ones and hundreds = 900
The sum of digits = 18
Let The number of ones digit = O
And The number of hundreds digit = H
So, According to question
 H + O = 18              .........1
100 × H + 1 × O = 900          ........2
Solving the equation
( 100 × H - H ) + ( O - O ) = 900 - 18
Or, 99 H + 0 = 882
Or , 99 H = 882
∴   H = 
I.e H = 8.9
Put the value of H in eq 1
So, O = 18 - H
I.e  O = 18 - 8.9
∴    O = 9.1
So, number of once = 9.1
number of hundreds = 8.9
Hence The number of once is 9.1  and The number of hundreds is 8.9
Answer
 
        
             
        
        
        
Answer:
x = 4, y = 3
Step-by-step explanation:
Equating corresponding coordinates , gives
2x = 8 ( divide both sides by 2 )
x = 4
and
3y = 9 ( divide both sides by 3 )
y = 3
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
Just make sure that the x value is not being repeated twice. because one of the given points is (4,9) you cannot have the point (4,0). X value cannot repeat in a valid function. 
 
        
             
        
        
        
Answer:
181.46 cm
Step-by-step explanation:
28.47 * 637.47 / 100 = 181.46