Let A and B be subsets of the universal set U. Draw an appropriate Venn diagram and use the following data to determine the number of elements in each basic region.n(U) = 90, n(A') = 42, n(A' ? B) = 30, n(A ? B) = 10
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Mathematics
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Perform the computation.-4 - 7
A. -11 B. -3 C. 3 D. 11
Mathematics
Write the inequality in interval notation.x < 4 or x < 7
A. (4,?) B. (-?,7) C. (4,7) D. (4,-?) ? (7,?)
Mathematics
Solve the problem.The price p and the quantity x sold of a certain product obey the demand equation: 
What is the revenue to the nearest dollar when 300 units are sold?
A. $42,000 B. $78,000 C. $110,000 D. $20,000
Mathematics
Establish the identity.cot 2 x + csc 2 x = 2 csc 2 x - 1
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Mathematics