Solve the system by the Gauss-Jordan method.
?
?
?

A. ?
B. ?
C. ?
D. ?
E. ?

Answer: D

Mathematics

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Determine all pairs (x, y) of integer values of x and y that satisfy the equation.|x| + |y| = 1

A. (0, 1), (0, -1), (1, 0), (-1, 0), (1, -1), (-1, 1) B. (0, 1), (1, 0) C. (0, 1), (0, -1), (1, 0), (-1, 0), (1, -2), (-1, 2), (2, -1), (-2, 1) D. (0, 1), (0, -1), (1, 0), (-1, 0)

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Write the logarithmic equation in its equivalent exponential form.log1/5 625 = -4

A. -4= 625
B. (-4)1/5 = 625
C. -4 = 
D. 5625 = -4

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Mathematics

Use the unit circle to determine the value of the given expression or state that it is undefined.sin 

A. - 
B. - 
C. -1
D.

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Solve the problem.Wind speed varies in the first twenty meters above the ground. For a particular day, let  compute the wind speed x meters above the ground. At what height is the wind speed 11 meters per second? Round results to the nearest hundredth.

A. 4.01 m B. 1.39 m C. 0.80 m D. 0.25 m

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Mathematics