Decide whether or not the events are mutually exclusive.Speaking Spanish and speaking Chinese
A. Yes
B. No
Answer: B
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Solve the system of equations using the inverse of the coefficient matrix.x - 2y + 3z = 114x + y - z = 42x - y + 3z = 10
A. No solution B. x = 2, y = 3, z = 5 C. x = -2, y = -3, z = 3 D. x = 2, y = -3, z = 1
True or false?A person who scored at the first quartile in a test scored higher than 375 people if 500 people took the test.
A. True B. False
Identify the vertex and axis of symmetry of the parabola.x = -2y2 - 4y - 5
A. Vertex (-3, 1); Axis of symmetry y = 1 B. Vertex (3, 1); Axis of symmetry y = 1 C. Vertex (-3, -1); Axis of symmetry y = -1 D. Vertex (3, -1); Axis of symmetry y = -1
An object attached to a coiled spring is pulled down a distance a from its rest position and then released. Assuming that the motion is simple harmonic with period T, write an equation that relates the displacement d of the object from its rest position after t seconds. Also assume that the positive direction of the motion is up.a = 16;
T = 8 seconds
A. d = -16 cos 
B. d = -8 cos 
C. d = -16 sin 
D. d = -16 cos 