Find the domain of the composite function f?g.f(x) = 5x + 40, g(x) = x + 2

A. (-?, 10) ? (10, ?)
B. (-?, ?)
C. (-?, -8) ? (-8, -2) ? (-2, ?)
D. (-?, -10) ? (-10, ?)


Answer: B

Mathematics

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Which of the following is more probable? A. Flipping a coin 4 times and obtaining at least 3 heads.B. Flipping a coin 5 times and obtaining at least 3 heads.?

A. A B. B C. same D. cannot tell

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Provide an appropriate response.The payoff table for three possible courses of action A1, A2, and A3 is given below.pi?A1xi?A2xi?A3xi?.3$70$40$50.2$100$120$110.1$160$140$90.4$80$140$160Which course of action will produce the largest expected value? What is it?

What will be an ideal response?

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Find the vertex, focus, and directrix of the parabola. Graph the equation.(y + 2)2 = (x + 2)

A. vertex: (2, 2)
focus: (2.25, 2)
directrix: x = 1.75

B. vertex: (2, 2)
focus: (2, 2.25)
directrix: y = 1.75

C. vertex: (-2, -2)
focus: (-2, -1.75)
directrix: y = -2.25

D. vertex: (-2, -2)
focus: (-1.75, -2)
directrix: x = -2.25

Mathematics

Solve for the variable. Choose the method you feel will work best.5x2 + 8x + 1 = 0

A. x = 
B. x = 
C. x = 
D. x = 

Mathematics