3(x)-5=x+5
3x=-5+5+x
3x=x
0=x
because 3x=x is basically would make each part into 0 which would end up the same. 
        
             
        
        
        
Angle MNO is 90, it’s just the top right corner
        
                    
             
        
        
        
Answer:  a+b+c/3
Step-by-step explanation:
mean= sum of all values/number of values
 
        
             
        
        
        
Answer:
6 1/4
Step-by-step explanation:
When you look at the bar graph at the top, you will see that there are 5 of 1 1/4. 
If you multiply 5 by 5/4 (which is 1 1/4 converted to an improper fraction), you get 25/4. To convert that to a mixed number, divide 25 by 4 and put the remainder over 4. The final answer should be 6 1/4. 
For the X's, just count how many of each number is in the graph above. For example, there should be 2 X's over 1, 5 X's over 1 1/4, 2 X's over 1 1/2, and 2 X's over 1 3/4. 
 
        
                    
             
        
        
        
No, the first choice equals 190 and the second 144.