Step-by-step explanation:
y = -2x + 1. => Slope = -2
Then the perpendicular line will have a slope of -1/(-2) = 0.5.
We have y = 0.5x + c.
When x = 4, y = -3.
=> (-3) = 0.5(4) + c, c = -5.
Hence the answer is y = 0.5x - 5. (C)
 
        
             
        
        
        
Answer:
x = 2.25
Step-by-step explanation:
  -9(x - 5) = x + 22 1/2
Distribute the nine and then add 9x to both sides
  -9x + 45 = x +22 1/2
+ 9x        + 9x
Then try to get x alone
        45 = 10x + 22 1/2
      -22 1/2       -22 1/2
     22.5 = 10x
    
    2.25 = x
 
        
                    
             
        
        
        
Answer:
34
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Nicole should take 13 1/8 cups of snack mix. 
Step-by-step explanation:
If a serving size is 7/8 and Nicole wants to take 15 serving sizes (15 7/8's), then we must multiply 7/8 by 15:
15 × 7/8
Write 15 over 1 (15 = 15/1) to make the calculations easier:
15/1 × 7/8
Multiply the numerators and denominators separately:
15 × 7 / 1 × 8
105 / 8
Instructions don't say you have to do this but I will convert this improper fraction into a mixed number: 
105/8 = 13 1/8
 
        
             
        
        
        
SAS, those lines are the S-(sides) and the angle is in the middle of that makes sense, I hope this helped!