Mathematics, 18.07.2019 20:10, jokerr6323
Prove each statement that is true and find a counterexample for each statement that is false. assume all sets are subsets of a universal set u.
for or all sets a, b, and c, a∩(b−c) = (a∩ b)−(a∩c)
hint: the statement is true. sketch of proof: if x ∈ a∩(b−c), then x∈a and x∈b and x∉c. so it is true that x∈a and x∈b and that x∈a and x∉c. conversely, if x ∈ (a∩ b)−(a∩c), then x∈a and x∈b, but x ∉ a∩c, and so x∉c.
Answers: 2
Mathematics, 21.06.2019 17:00, faithcalhoun
Acylinder has volume 45π and radius 3. what is it’s height?
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Mathematics, 21.06.2019 20:30, Travisbennington
Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.
Answers: 1
Mathematics, 21.06.2019 23:30, andreawright13
The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?
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