Answer:
B
Step-by-step explanation:
The number is between 10 and 49
The number is divisible by 3
Let the 10s digit = x
Let the units digit = y
1/3 * (10x + y)  = x + y          multiply both sides by 3
10x + y = 3(x +y)                  remove the brackets.
10x +y = 3x + 3y                  Subtract 3x from both sides
10x - 3x + y = 3y                  Combine\
7x + y = 3y                           Subtract y from both sides.
7x = 3y - y                           Combine
7x = 2y
x can't be very big. Even taking 1/3 will get out of range is you use 6. 
Also x should be an even number. The units digit cannot have a fraction in it. 
Try making x = 2
7*2 = 2*y
14 = 2y                                Divide by 2
14/2 = y
y = 7
So the number is possibly 27. Let's check it out.
- The number is between and includes 10 and 49. 27 is between these two endpoints.
- 27 is divisible by 3
- 1/3(27) = sum of digits
- 9 = (2 + 7)
All of the conditions are met. It's B
 
        
             
        
        
        
Answer: Use all numbers to add. 
2918+49=2967
Estimated.... 2918+49 ≈ 3050
Hope this helps you out.
 
        
                    
             
        
        
        
Answer:
$210
Step-by-step explanation:
9.50*4=    38
5*2=10*4=40
3*4=          12
4*4=          16
26*4=    +104
              ---------
                210
 
        
                    
             
        
        
        
Down because it has a negative coefficient.