Answer:
the third one
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
9/10
Step-by-step explanation:
step 1
Compare the slopes



therefore
An experienced skier would like the 9/10 hill slope because it is steeper, while the 1/10 is a softer slope.
 
        
             
        
        
        
Answer:
x = -3
Step-by-step explanation:
y = -x + 2
7x + 4y = -1 
Subsitution method: (Substitute y) 
7x + 4(-x+2) = -1 
Expand. 
7x + (-4x + 8) = -1
One plus and one minus make one minus. Two plus makes a plus. 
7x -4x + 8 = -1 
Simplify. 
3x + 8 = -1
Isolate 3x. 
3x = -1-8
     = -9
Find x. 
x = -9 ÷ 3 
   = -3