Answer:
Boy
Step-by-step explanation:
The ratio is 8:12, the ratio can be simplified to 2:3 and simply by looking at it, you have a chance of another boy, like a 3 in 2 chance
 
        
             
        
        
        
Answer:
Step-by-step explanation:
The system of equations given are: 
  
  5x - y + z = -6   ------------- i 
  2x + 7y + 3z = 8  ---------- ii 
   x + 2z = 6 ----------------- iii
Let us deal with equation i and ii first since they have 3 variables x, y and z; 
       5x - y + z = -6                 x 7
        2x + 7y + 3z = 8            x 1
     35x  - 7y + 7z  = -42   ----  iv 
       2x  + 7y + 3z  = 8       ---- v 
Add equation iv and v; 
     37x + 10z  = -34 ------vi
 So, let us solve equation vi and iii: 
                x + 2z = 6 - ---------- iii   x 10 
                37x + 10z  = -34  --- iv  x 2
     10x + 20z   = 60         vi
      74x + 20z  = -68        vii
Subtract vi  - vii; 
       -64x  = 128 
            x  = -2
So;    put x  = -2 into iii; 
            x + 2z  = 6 
            -2 + 2z  = 6 
             2z  = 6 + 2  = 8 
             z  = 4 
Put x  = -2 and z = 4 into equation i;
   5(-2) - y + 4  =  - 6 
    -10 -y  +4  = -6 
        -6  - y  = -6 
              -y  = 0
               y  = 0
 
        
             
        
        
        
Answer: Rosie is incorrect because she needs to do the exponent before subtracting.
        
             
        
        
        
Answer:
x-(x times 33%)  or x times (100-33)%
Step-by-step explanation: