Determine the real solutions to the system of nonlinear equations.x2 + y2 = 25x2 - y2 = 25

A. (0, 5)
B. (0, 5), (0, -5)
C. (5, 0)
D. (5, 0), (-5, 0)


Answer: D

Mathematics

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Perform the indicated operation.

A. 12 B. 9 C. -12 D. -9

Mathematics

Factor completely. If the polynomial cannot be factored, say it is prime.x2 - x - 45

A. prime B. (x + 5)(x - 9) C. (x - 45)(x + 1) D. (x - 5)(x + 9)

Mathematics

Find an equation for the ellipse described.Vertices at (-2, 5) and (14, 5); focus at (12, 5)

A.  +  = 1
B.  +  = 1
C.  -  = 1
D.  +  = 1

Mathematics

Evaluate the expression for the given replacement values.x - yfor x = -3, y = -21

A. 24 B. -24 C. -18 D. 18

Mathematics