Find the length and direction (when defined) of u × v.u = 2i + 2j - k, v = -i + k
A. 3; 
i - 
j + 
k
B. 3; 
i + 
j - 
k
C. 9; 
i + 
j - 
k
D. 9; 
i - 
j + 
k
Answer: A
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Find the x- and y-intercepts of the graph of the equation. x = y2 - 9y + 20
A. x-intercept: -20; y-intercepts: -5, -4 B. x-intercepts: 5, 4; y-intercept: 20 C. x-intercepts: -5, -4; y-intercept: -20 D. x-intercept: 20; y-intercepts: 5, 4
Use the equation and the corresponding graph for the quadratic function to find what is requested.f(x) = (x - 1)2 - 3
Find the coordinates of the vertex.
A. (1, -3) B. (-1, 3) C. (1, 0) D. (-1, -3)
N is Poisson (1.8).
Find E ( X ), Var ( X ), and SD( X ) for the given random variable.
Solve the triangle.b = 5, c = 7, A = 95°
A. a = 7.95, B = 51.2°, C = 33.8° B. a = 9.95, B = 33.8°, C = 51.2° C. a = 8.95, B = 51.2°, C = 33.8° D. a = 8.95, B = 33.8°, C = 51.2°