What number should be added to complete the square of the expression?x2 + x

A.
B.
C.
D.


Answer: A

Mathematics

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Solve the equation. =  + 3

A. {63}
B. {21}
C. {27}
D.

Mathematics

Solve the system of linear equations.

A. no solution B. (-1, 4, 1) C. (-1, 1, 4) D. (4, 1, -1)

Mathematics

Convert as indicated. Express the answer in decimal form when needed.420 seconds to minutes

A. 17 min B. 13 min C. 3 min D. 7 min

Mathematics

Solve the problem.If f(?) = cot ? and f(a) = -5, find the exact value of f(-a).

A. 5
B.
C. - 
D. -5

Mathematics