Find the equation of the axis of symmetry of the parabola.y = -3x2 + 6x - 9
A. x = 6
B. x = 2
C. x = - 1
D. x = 1
Answer: D
Mathematics
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Find the slope of the curve at the given point P and an equation of the tangent line at P.y = x3 - 5x, P(1, -4)
A. slope is 3; y = 3x - 7 B. slope is -2; y = -2x - 2 C. slope is -2; y = -2x D. slope is 3; y = 3x - 3
Mathematics
Find the center and the radius of the sphere that has the given equation.
x²+y²+z²-2x+6y=0
Mathematics
Factor by grouping.(x - 8)(x - 6) + (x - 8)
A. (x + 8)(x - 7) B. (x - 8)(x - 5) C. (x + 8)(x + 7) D. (x - 8)(x - 7)
Mathematics
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Mathematics