Write the number in scientific notation.0.0000004

A. 4 × 106 
B. 4 × 10-6 
C. 4 × 107 
D. 4 × 10-7

Answer: D

Mathematics

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A. 16
B. 16
C. 16 
D. 6

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Solve.7x + 3 - 4(x + 1) = -4x - 5

A. x = -4
B. x = - 
C. x = - 
D. x = 

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Solve the system of equations using matrices. Use Gauss-Jordan elimination.

A. {(-3, 4, 6)} B. {(6, 4, -3)} C. {(3, 4, 7)} D. {(3, 7, 4)}

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Find an equation for the graph.

A. y = -4 sin 
B. y = -4 cos (3x)
C. y = -4 sin (3x)
D. y = -4 cos 

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Mathematics