Simplify the expression. Assume that all variables are positive.

A. t2z3
B. t3z2
C.
D.

Answer: C

Mathematics

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Find the indicted product and simplify if possible.The expression 9x2 - 18(x - 3)2 - (x - 6)3 was used to determine the stress in a section of metal.

A. -x3 - 303x2 + 36x + 207 B. -x3 - 9x2 + 378 C. -x3 - 21x2 + 180x - 378 D. -x3 + 9x2 + 54

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Graph the parabola whose equation is given.y = -x2 - 2x + 8

A.

B.

C.

D.

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Determine whether the proportion is true or false. = 

A. True B. False

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Convert as indicated. Express the answer in decimal form when needed.9 minutes to seconds

A. 540 sec B. 270 sec C. 216 sec D. 108 sec

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Mathematics