Answer:
1476:1845
Step-by-step explanation:
4+5=9
4÷9 ×3321
And
5÷9=3321
1476:1845
 
        
             
        
        
        
Where he started (495) minus 6 feet per second (-6t) till he gets to the ground (=h)
Put them together: 495-6t=H :) 
Hope that helps
        
                    
             
        
        
        
Hello 
cos ( x + pi/2) =cos(x)cos(pi/2)-sin(x) sin(pi/2) 
                       = cos(x)×0-sin(x) ×1
                    cos ( x + pi/2)   = - sin(x)
        
                    
             
        
        
        
Answer:
Her error was multiplying -3 and -4 which gives +12 but she wrote -12 instead
Step-by-step explanation:
Mariana workings:
-3(2x - 4) = -12 
-6x - 12 = -12 
Her error was multiplying -3 and -4 which gives +12 but she wrote -12 instead
-6x = 0 
x=0
Correct workings:
-3(2x - 4) = -12 
-6x + 12 = - 12
-6x = -12 - 12
-6x = -24
x = -24/-6
x = 4
 
        
             
        
        
        
Answer:
If your weekly allowance is 5, then for Christmas week your allowance was 15, then your allowance went up by: 5 =3 - 1 = 2 x 100 =200%.