Joyce waited 50 minutes waiting for the train
Step-by-step explanation:
divide 60 by 3 cause 3 quarters of an hour is 3/4 then you wanna take half an hour and add that (30 mins) getting 50 minutes 
 
        
             
        
        
        
Answer:
5 (5x1) , -10 -(5x2), 20(10x2), -40 -(20x2), 80(40x2) 
so the next number should be previous number in the sequence multiplied by 2 and a negative sign.
-`(80x2) = -160
 
        
                    
             
        
        
        
Answer: So, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.
hope this helps
 
        
             
        
        
        
Answer:
hope its help u
Step-by-step explanation:

 
        
             
        
        
        
The answer is D, 10. 4 years ago she was 6, so William must have been 1 (1/6 of 6). In 6 years time she will be 16 (10+[4+6 years]).