Find the area of the specified region.Inside the graph of r = 8 + cos 3?

A.  + 
B. 129? + 
C. 129?
D.

Answer: D

Mathematics

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Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.

A. {(1, 7)} B. no solution; ? C. {(-8, 0)} D. {(0, 8)}

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Mathematics

Solve by the method of elimination by substitution.2x - 2y = -103x + 3y = 27

A. x = -2, y = 7 B. x = 2, y = 7 C. x = -7, y = -5 D. Inconsistent

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Mathematics

Use the figure to find the weight of the indicated path.  Path: "ECDBA"

A. 67 B. 65 C. 72 D. 60

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Mathematics

Solve. To measure the spread of data, statisticians compute the sample variance of the data. For a sample of size 3, the sample variance can be computed using the expression  where m is the mean of the three values a, b, and c. Rewrite this expression without parentheses, combining like terms.

A. 3m2 - 2am - 2bm - 2cm + a2 + b2 + c2
B.
C.
D.

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Mathematics