Find the focus and directrix of the parabola with the given equation.x2 = -28y
A. Focus: (0, -7), directrix: y = 7
B. Focus: (-7, 0), directrix: x = 7
C. Focus: (0, 7), directrix: y = -7
D. Focus: (7, 0), directrix: x = -7
Answer: A
Mathematics
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Convert the weight as indicated.9750 pounds to tons (Express the answer as a mixed number.)
A. 6
T
B. 9
T
C. 3
T
D. 4
T
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Match the graph to one of the polar equations.
A. r = 4 cos ? B. r = 2 C. r sin ? = 2 D. r = 4 sin ?
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Solve the inequality and graph the solution set.-10y + 4 ? -11y - 1
A. {y|y > -10} or (-10, ?)
B. {y|y < -10} or (-?, -10)
C. {y|y ? -5} or [-5, ?)
D. {y|y ? -5} or (-?, -5]
Mathematics
Graph the equation and state whether the line has a positive or negative slope.y + 1 = 6x
A. Positive slope
B. Positive slope
C. Negative slope
D. Negative slope
Mathematics