Answer:
10x+3y+2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x=21.
Step-by-step explanation:
First you distribute 3 to the parenthesis. You should get 3x-21=42 at this point. Then you add 21 to 42 to get 63. Here you should be at 3x=63. Divide 63 by 3 to get x=3
 
        
                    
             
        
        
        
Answer:
The probability that the candidate score is 600 or greater 
P(X≥ 600 ) = 0.0228
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
Given mean of the Population = 500
Given standard deviation of the Population = 50
Let 'X' be the random variable in normal distribution
Given  X = 600

<u><em>Step(ii)</em></u>:-
The probability that the candidate score is 600 or greater
P(X≥ 600 ) = P(z≥2)
                   = 0.5 - A(2)
                  = 0.5 -0.4772
                 = 0.0228
<u><em>Final answer</em></u>:-
The probability that the candidate score is 600 or greater 
P(X≥ 600 ) = 0.0228
 
        
             
        
        
        
Answer:
The statement means that after 2 hours, there are 90 bacteria in the culture.
Step-by-step explanation:
The number of bacteria after x hours is given by the function states in the exercise. We have that f(x) will be the number of bacteria after x hours.
Which statement best describes the meaning of the equation f(2) = 90 ?
The statement means that after 2 hours, there are 90 bacteria in the culture.
 
        
             
        
        
        
Is the x2 supposed to be squared?