Solve the quadratic equation by completing the square.x2 - 5x - 5 = 0

A. 5 ± 3
B.
C.
D.


Answer: D

Mathematics

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Find the power series representation for f(x).f(x) = e4x + e-4x

A. 8x +  +  + . . .
B. 1 +  +  + . . .
C. 2 +  +  + . . .
D. 2 + 8x +  +  + . . .

Mathematics

Solve and give interval notation for the solution set. Then graph the solution set.4 < 1 - 4x ? 10

A.


B. ,    


C.


D.   


Mathematics

Solve the problem.If Gloria received a 6 percent raise and is now making $24,380 a year, what was her salary before the raise? Round to the nearest dollar if necessary.

A. $24,000 B. $22,917 C. $23,000 D. $22,380

Mathematics

Simplify. Write your answer in the form a + bi, where a and b are real numbers.Let z = 2 - 4i and w = 2 + 7i. Find zw.

A. 32 + 6i B. -28i2 + 6i - 4 C. -24 - 22i D. 32 - 6i

Mathematics