f(x) = 112 - kx
 f(-3) = 112 - k(-3)
 f(-3) = 112 - (-3k)
 f(-3) = 112 + 3k
  121 = 112 + 3k
- 112  - 112
      9 = 3k
      3     3
      3 = k
        
             
        
        
        
Answer:
To plot point A, you would count over to the left six places on the x-axis. Then, count up two places on the y-axis.
 
        
             
        
        
        
3x²-8x+4=0
(3x-2) (x-2)=0
x=2/3 ,  x = 2
Hence, the polynomial has two positive roots.
Option A is the correct choice.
        
             
        
        
        
Average of 2 numbers is 40
so total = 2 x 40 = 80
300 - 80 = 220
average of remaining 10 numbers = 220/10 = 22
answer
B) 22