A proportion is two ratios equivalent to each other
 
        
             
        
        
        
The correct answer for this would be the last option. The factors of 48m - 80n are 16(3m - 5n). If you try to solve this, the result would be 48m - 80n. 16 x 3m would be 48m and 16 times 5n would be 80n. Hope this is the answer that you are looking for. 
        
             
        
        
        
Pemdas
so do parenthaseese first
work inside then out
(25 times 2)
(50)
now we have
96/42+(50)-15-3=?
start from the begining again of the equation (left) now we do division 
96/42=16/7
now we have 16/7+(50)-15-3
start over and do addition
16/7+50=2 and 2/7+50=2+2/7+50=52 and 2/7
subtract
52 and 2/7-15=52+2/7-15=37 +2/7=37 and 2/7
then subtract 3
37 and 2/7-3=37+2/7-3=34+2/7=34 and 2/7
answer is 34 and 2/7
        
             
        
        
        
Answer:
Attached
Step-by-step explanation:
Ordering the numbers from greater to the lesser we would get that:
3 > 1 3/4 > -0.5 > -3.
Knowing that, we can proceed to represent each number on the number line, which is attached!
 
        
             
        
        
        
5 divided by 3 is .6. I hope this makes sense. Good luck. I apologize if this is wrong