Find the coordinates of the vertex and the direction of opening of each parabola.y = (x + 1)2 + 1
A. (0, 1) opens downward
B. (-1, 1) opens upward
C. (-1, -1) opens upward
D. (1, 0) opens downward
Answer: B
Mathematics
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Find the equation of the normal line to the indicated curve at the given point.y = 4x - 2x2 at (-4, -48)
A. y = - 
x - 
B. y = 
x + 
C. y = 
x + 
D. y = - 
x - 
Mathematics
Factor.81k2 - 16m2
A. (9k + 4m)(9k - 4m) B. (9k + 4m)2 C. 81k2 - 16m2 D. (9k - 4m)2
Mathematics
Factor.20x3 + 31x2 + 12x
A. x(4x - 3)(5x - 4) B. x(4x + 3)(5x + 4) C. x(20x + 1)(x + 12) D. (20x2 + 3)(x + 4)
Mathematics
Evaluate the expression using the given values.
x = -5, y = 7
A. -2 B. -12 C. 12 D. 2
Mathematics