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
Mathematics
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
Mathematics
Use a graphing utility to graph the polar equation.r = sin4 5? + cos 3?
A. 
B. 
C. 
D. 
Mathematics
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