Answer:
ab<6 units
Step-by-step explanation:
One of the basic property of any triangle is that the sum of the length of any two sides of a triangle is always greater than the length of the third side. 
Here we are given a triangle abc, in whicn bc=4
ac= 8-ab
If have to make some conclusion about ab.
As per the property discussed above 
ab<ac+bc
ab<8-ab+4
2ab<12
ab<6
Hence the length of ab must be less than 6 units 
 
        
             
        
        
        
Answer:
~ 12.57
Step-by-step explanation:
 
        
             
        
        
        
The answer is B.




If you find a common denominator, the process becomes much easier. I hope this was helpful.
 
        
             
        
        
        
By substitution,
1.5x - 6 = -4.5x + 21
6x = 27
x = 4.5
Hence, y = 1.5(4.5) - 6 = 0.75
 
        
                    
             
        
        
        
Answer:
x = -2
Step-by-step explanation:
3x+2=−4
3x+2−2=−4−2(Subtract 2 from both sides)
3x=−6
3x
/3
=
−6
/3
(Divide both sides by 3)
x=−2