Simplify.-4b + 6b

A. -10b
B. -2b
C. 2b2
D. 2b


Answer: D

Mathematics

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Solve the system of linear equations using the Gaussian elimination method. If there is no solution, state so; if there are infinitely many solutions, find two of them.

What will be an ideal response?

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Solve the equation. If the solutions involve square roots, give both the exact solutions and the approximate solutions to three decimal places.6d2 + 19d + 15 = 0

A.
B.
C. - , - 
D. - , - 

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Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.2.1x + 0.7y - 1.3z = 3.95.2x - 7.0y + 1.2z = -4.94.1x + 0.3y + 2.4z = -1.5

A. {(0.3, 0.4, -0.8)} B. {(0.4, 0.6, -1.3)} C. {(0.1, 0.2, -0.4)} D. {(0.6, 0.8, -1.7)}

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Find the nth term {an} of the geometric sequence. When given, r is the common ratio.3, 1, , ...

A. an = 3 ? n + 1
B. an = 3 ? n-1
C. an = 3 ? n
D. an = 3 ? n-1

Mathematics