Classify the following as the equation of a parabola, a circle, an ellipse, or a hyperbola.2x2 + 4y2 - 6x + 9 = y2 - x2 + 5x
A. Ellipse
B. Hyperbola
C. Parabola
D. Circle
Answer: D
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Find an equation for the line tangent to the given curve at the indicated point.y = x2 - 4 at (-2, 0)
A. y = -4x - 12 B. y = -4x - 8 C. y = -2x - 8 D. y = -4x - 16
Use the ratio test to determine if the series converges or diverges.
A. Converges B. Diverges
Solve the problem.Which of the following is not required in a double-blind placebo experiment?
A. Neither the members of the control group nor the members of the treatment group know to which of the two groups they belong. B. There is a control group and a treatment group. C. The scientists conducting the study do not know which individuals are in the treatment group and which are in the control group. D. The size of the control group and treatment group are the same. E. none of these
Use a calculator to decide whether the statement is true or false.sin (2 ? 150°) = 2 ? sin 150° ? cos 150°
A. True B. False