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Define the two numbers
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Let one number be x and the other be y
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Form equations and solve
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x + y = -14 --------------- (1)
y - x = 12 ------------------(2)
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(1) + (2)
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2y = -2
y = -1
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Substitute y = -1 into (2)
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y - x = 12
-1 - x = 12
x = -1 -12
x = -13
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Answer: x = -13, y = -1
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Answer:
Step-by-step explanation:
i dont know
Answer:
https://web2.0calc.com/questions/math-problems_7
Answer:
a) P(X=41)= 0.0086 = 0.86%
b) P(36≤X≤38)== 0.1215 = 12.15%
c) would be unusual that fewer that 20 murders were cleared because P(X≤20) = 0.000081 =0.0081%
Step-by-step explanation:
if the random variable X= number of cleared murders , then X follows a binomial distribution:
P(X=x)= n!/[(n-x)!*x!]*p^x*(1-p)^(n-x)
where P(X=x)= probability of x cleared murders, n= number of murders selected=50 , p= probability for a murder to be cleared (67%)
therefore
a) P(X=41)=50!/[(50-41)!*41!]*0.67^41*0.33^(50-41)= 0.0086
b) P(36≤X≤38)= P(X≤38) - P(X≤36) = 0.9371- 0.8156 = 0.1215
c) P(X≤20) = 0.000081
therefore would be unusual that fewer that 20 murders were cleared
