Find the solution to the quadratic equation, if they exist.
k²+ 2k= 5
Mathematics
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Solve the equation by completing the square.2x2 + 8x = -3
A. 
B. ?
C. 
D. 
Mathematics
Provide the requested information about the circular function.What is the range of y = cos x?
A. [-1, 1] B. (-?, -1] ? [1, ?) C. (-?, ?) D. (-1, 1)
Mathematics
Solve the problem.The equation E = 0.006x3 - 0.0033x2 + 0.127x + 1.42 gives the approximate total earnings of a company, in millions of dollars, where
corresponds to 1996. Determine the earnings for 1997.
A. $1.42 million B. $1.55 million C. $1.71 million D. $1.56 million
Mathematics
Provide an appropriate response.Are both 2 and 
natural numbers, integers, or irrational numbers?
A. Irrational numbers B. Integers C. Natural numbers D. None of the above
Mathematics