Add or subtract as indicated. Write the answer in lowest terms. - 

A.
B.
C.
D.

Answer: D

Mathematics

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Calculate the flux of the field F across the closed plane curve C.F = (x+y)i + xyj; the curve C is the closed counterclockwise path around the rectangle with vertices at    and 

A.
B.
C. - 
D. 30

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Mathematics

Use the formula for the sum of the first n terms of a geometric sequence.Find .

A. -5462 B. 2730 C. -10,922 D. -2730

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Mathematics

Solve the variation problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination 5 feet from a light is 2 foot-candles, what is the intensity 15 ft from the light?

A. 1 foot-candles
B. 2 foot-candles
C.  foot-candles
D.  foot-candles

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Mathematics

Find the indicated term of the geometric sequence.a1 = , r = ; Find a6.

A. a6 = 
B. a6 = 
C. a6 = 
D. a6 = 

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Mathematics