Solve each proportion for the given variable. = 

A. 4
B.
C. 2
D. 578


Answer: C

Mathematics

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Solve the problem.Find  .

A. 0 B. 1 C. 8 D. Does not exist

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Determine the period of the function.Period of y = -5 cos (8?x + 4?)

A.
B. 4
C. 8?
D.

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A right triangle with acute angle ? is given. Evaluate the indicated trigonometric function of the acute angle ?.Find sin ?.

A.
B.
C.  
D.

Mathematics

Use the graph to find the standard equation of the circle.

A. (x + 1)2 + y2 = 16 B. x2 + (y + 1)2 = 16 C. (x + 1)2 + y2 = 4 D. (x - 1)2 + y2 = 16

Mathematics