Answer:
55
Step-by-step explanation:
 
        
                    
             
        
        
        
In this question, there are 3 conditions that need to be met
1. The number is 3-digit
2. Hundreds digit >7 (number that will fulfill it would be 8 or 9)
3. The tens is 1 more than hundred( since the hundred possibilities is 8 or 9, then 9 in hundreds can't be used since no number higher than 9)
4. The one digit <2( that mean 0, 1)
Using the list above, you can make your possible number:
890
891
        
             
        
        
        
Answer:
The dimensions are 5 and 10 inches
Step-by-step explanation:
The area is 50 square inches and the length is twice the width. 10 is the length, which is two times 5. 10 times 5 is 50. 
The length is 10 and the width is 5. 
 
        
             
        
        
        
Lwh = (3+3+6) (4) (7)
12 x 4 x 7 = 336
        
             
        
        
        
It should be x=11. could someone fact check me?