Find the integral using an appropriate trigonometric substitution. Select the correct answer.

c.

Mathematics

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Multiply or divide, as indicated. Simplify the answer.

A. - 
B. - i
C.
D. i

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Mathematics

Solve by separating the two absolute values into equal and opposite cases. = 

A.
B. {5, }
C. ?
D. {- 5, - }

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Mathematics

Use both properties of equality to solve the equation. - 4 = 1

A. -20 B. -9 C. 20 D. 9

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Mathematics

Solve the problem.Joe has traveled  of his total trip. If the trip is a total of 640 miles, how many miles has he gone?

A. 102 miles
B. 128 miles
C. 512 miles
D. 256 miles

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Mathematics