Use the discriminant to find what type of solutions (two rational, two irrational, one rational, or two nonreal complex) each of the following equations has. Do not solve the equation.5 + 4x2 = -2x

A. two rational solutions
B. two irrational solutions
C. two nonreal complex solutions
D. one rational solution


Answer: C

Mathematics

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Find ? to four significant digits for 0 ? ? < 2?.sin ? = -0.9388

A. -0.2191, 4.361 B. 2.790, 7.502 C. 5.064, 4.361 D. 5.064, 1.922

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Solve the problem.A trough is to be made with an end of the dimensions shown. The length of the trough is to be  long. Only the angle ? can be varied. What value of ? will maximize the trough's volume?

A. 52 B. 32° C. 30° D. 8

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Use a graphing utility to graph the polar equation.r = sin4 5? + cos 3?

A.

B.

C.

D.

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Given f(x) and g(x), find the indicated composition and evaluate.f(x) = -5x + 6; g(x) = 4x2 - 8x + 7Find (f ? g)(7).

A. -729 B. 123 C. 3603 D. 111

Mathematics