Choose the equation that matches the graph.
A. y2 = -8x
B. x2 = -8y
C. -8x2 = y
D. x2 = 8y
Answer: B
Mathematics
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Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set.x - y + z = 3x + y + z = -5x + y - z = -7
A. Cramer's rule does not apply since D = 0; ? B. {(-2, 1, -4)} C. {(-2, -4, 1)} D. {(1, -2, -4)}
Mathematics
Solve the equation.4(5 + 3x) = 
A. 
B. {-3}
C. {128}
D. {3}
Mathematics
Find the expected value for the random variable.
A. 7.94 B. 7.54 C. 9 D. 7.66
Mathematics
Write the product as a sum or difference of trigonometric functions.2 cos 8x cos 2x
A. cos 6x - cos 10x
B. 
(cos 10x + cos 6x)
C. cos 10x + cos 6x
D. sin 10x + sin 6x
Mathematics