A professor pays 25 cents for each blackboard error made in lecture to the student who pointsout the error. In a career ofnyears
filled with blackboard errors, the total amount in dollarspaid can be approximated by a Gaussian random variableYnwith expected value 40nandand variance 100n. a. What is the probability thatY20exceeds 1000?(b) How many years n must the professor teach in order that P(Y_n > 1000) > 0.99?
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Answer:
<h3>There is one unique real number solution at (–1, –3)</h3>Step-by-step explanation:
Given the two linear equation
–4x – 7 = y ...1
x² – 2x – 6 = y ...2
Equating the left hand side of both equations since they are equal to the same variable y will give;
Substituting x=1 into equation 1 we have;
This means there is only one unique real number solution at (-1, -3)