Answer: 5.3 Hours
Step-by-step explanation: 140 mi there at 56 mi per hour would be 2.5 hours. Then back 140 mi at 50 mi/h would be 2.8. 2.5 plus a 2.8 is 5.3 hours 
 
        
             
        
        
        
Its A or 6 because 30 divided by 5 is 6
        
             
        
        
        
Answer:
y = x - 2
Step-by-step explanation:
y = mx + b
5 = 1 (7) + b
5 = 7 + b
b = -2
So...
y = x - 2
 
        
             
        
        
        
Answer:
|x-3|+4 = 12
|x-3| = 12-4
|x-3| = 8
now solve for both positive and negative values 
x - 3 = 8      |   x - 3 = -8
x = 8 + 3     |   x = - 8 + 3
x = 11          |    x = -5
solution set : { 11, -5 }
Step-by-step explanation:
 
        
             
        
        
        
Answer: D
(0,-4) (12,6)
slope= 10/12
slope== 5/6
y=5/6x+b
-4=0+b
b=-4 
the equation of the line is 
y=5/6x-4