Answer:
FIrst blank: lever
And, did you mean to put class?
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The answer to your question is (-1, 2)
Step-by-step explanation:
Data
        y = -4x - 2                 Equation l
        y = 2x + 4                  Equation ll
Process
-Graph equation l (green line)
  Plot the point (0, -2)
  Starting from this point plot the point (1, -4), this point comes from the slope.
-Graph the equation ll (blue line) 
  Plot the point (0, 4)
  Plot the point (1, 2) starting from the previous point.
-The solution is the point where the lines cross. This point is (-1, 2)
 
 
        
             
        
        
        
Answer: Hello mate!
The partition of a set is defined as a partition of the set into a nonempty subset, where the set itself is a subset of himself, then the set is a partition of himself.
a) in this we have a set of two objects; A = (1,2) the partitions of this set are: (∅), (1), (2) and (1,2). Where (∅) is the null set.
b) Now we have a set of three objects; B = (a,b,c) the partitions of this set are: (∅), (a), (b), (c), (a,b), (a,c), (b,c), (a,b,c)
 
        
             
        
        
        
Answer:
The probability a person selected random is not suffering from Malaria  is 0.725.
Step-by-step explanation:
Denote the events as follows:
X = a person is suffering from Malaria
M = a man 
W = a woman
The information provided is:
P (M) = P (W) = 0.50
P (X|M) = 0.10
P (X|W) = 0.45
Compute the probability a person selected random is suffering from Malaria as follows:

          
Then the probability a person selected random is not suffering from Malaria  is:
P (X') = 1 - P (X)
          = 1 - 0.275
          = 0.725