Verify the identity.(1 + tan2u)(1 - sin2u) = 1
What will be an ideal response?
(1 + tan2u)(1 - sin2u) = sec2u ? cos2u = 
? cos2u = 1
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Outliers pose a problem for which type of average: mean or mode? Explain why. ?
A. ?The mode; An outlier will shift the mode to a different value. B. The mode; An outlier will decrease the frequency of the already existing mode. C. The mean; An outlier will increase the sum of the data values, thus increasing the mean. D. ?The mean; An outlier will decrease the sum of the data values, thus increasing the mean. E. ?Neither; Outliers do not significantly affect either average.
Use counting rules to determine the probability.A student takes a true-false test consisting of 11 questions. Assuming that the student guesses at each question, find the probability that the student answers exactly 9 questions correctly.
A. 0.0161 B. 0.0215 C. 0.0107 D. 0.0269
Write the rate as a unit rate.171 miles in 3 hours
A. 174 miles/hour B. 57 miles/hour C. 513 miles D. 57 miles
Use a tree diagram to find the indicated probability.In the town of Cheraw, a certain type of laptop computer is sold at just two stores. Store A has 38% of the sales, 4% of which are of defective items, and store B has 62% of the sales, 2% of which are of defective items. A person receives one of these laptop computers as a gift. What is the probability it is defective?
A. 0.03 B. 0.014 C. 0.42 D. 0.028