Determine the symmetries of the curve.r = 3 cos ?

A. Origin only
B. No symmetry
C. x-axis only
D. y-axis only


Answer: C

Mathematics

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Solve the equation.5t - 4t = -16

A. -15 B. -16 C. -12 D. 16

Mathematics

Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?

A. 0.275 B. 0.22 C. 0.5667 D. 0.7083

Mathematics

Solve the system by the substitution method.y = 3x2 + 6x

A. {(2, 0), (-3, 9)} B. {(1, 9), (-6, 72)} C. {(-2, 0), (-3, 9)} D. {(2, 0), (3, 45)}

Mathematics

Use the binomial theorem to expand the expression.(x + y)4

A. x4 + 4x3 + 6x2 + 4x + 1 B. x4 + 4x3y + 4x2y2 + 4xy3 + y4 C. x4 + 4x3y + 6x2y2 + 4xy3 + y4 D. x4 + 4x2y2 + y4

Mathematics