Solve the problem.y varies directly as z and y = 221 when z = 13. Find y when z = 19.

A. 361
B. 289
C. 323
D. 169


Answer: C

Mathematics

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Given the graph of f, find any values of x at which f ' is not defined.

A. x = 1 B. x = -1 C. x = 0 D. x = 2

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Solve the problem.How many relay teams of 4 members can be chosen from a 6 member team to run in a relay race?

A. 18 B. 360 C. 24 D. 120

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Find the vertex of the parabola. ? ?

A. (9, 0) B. (3, 0) C. (3, -3) D. (0, 3) E. (-3, 0)

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Express the radical in simplified form. Assume that all variables represent positive real numbers.

A. 16a 
B. 2
C. 2a2
D. 2a

Mathematics