Solve and simplify.
+ y = -5
A. y = -13
B. y = - 
C. y = - 
D. y = 
Answer: B
Mathematics
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Show that the function is a solution of the wave equation.w(x, t) = e-9ct cos -9x
A. No B. Yes
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Express the number in scientific notation.0.000315
A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5
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Give the coordinates of the vertex and graph the equation in a window that includes the vertex.y = (x - 4)2 + 2
A. Vertex: (-4, 2)
B. Vertex: (-4, -2)
C. Vertex: (4, -2)
D. Vertex: (4, 2)
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Find n(A) for the set A.A = {x?x is a month in the year}
A. n(A) = 52 B. n(A) = 1 C. n(A) = 12 D. n(A) = 24
Mathematics