Answer:
|-45|
Step-by-step explanation:
In mathematics, the absolute value of a real number is the numeric value of the  number, regardless the sign, either this is positive or negative.
The absolute value function can be definied as: 
- |a|=a si a ≥0
- |a|=-a si a <0
 Using this definition, we have:
|-21| = -(-21) = 21
|14| = 14
|30| = 30
|-45| = -(-45) = 45
Therefore, the expression |-45| has the greatest value.
 
        
             
        
        
        
To divide fractions be multiply by the resiprical
4       6        24
--- x ----  = ------
1       7          7
then simplify into a mixed number
3  3/7
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
<u>A and B are same side interior angles and hence supplementary:</u>
<u>Substitute values and solve for x:</u>
-  6x - 18 + 14x + 38 = 180
- 20x + 20 = 180
- 20x = 160
- x = 160/20
- x = 8
<u>Find the measure of ∠A:</u>
 
        
             
        
        
        
Answer: 
Not sure explain it again 
Step-by-step explanation:
 B