Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.

A. t4
B. t-7
C.
D.

Answer: D

Mathematics

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Simplify the expression. Assume all variables represent positive real numbers. - 

A. 2 - 4
B. 6
C. 2 - 4
D. 4 - 2

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Mathematics

Give an appropriate answer.Using the following graph, find an Euler circuit that begins and ends with vertex A.

A. A ? B ? C ? D ? B ? E ? A B. A ? B ? C ? D ? E ? A ? B C. A ? B ? C ? D ? B ? A D. No Euler circuit exists.

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Mathematics

Multiply.

A. 124,176 B. 124,276 C. 124,186 D. 124,166

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Mathematics

Solve the system of equations.y + 5z=21-3x + y+ 2z =12-2x+ 2z =10

A. (-1, 1, 4) B. (1, 2, 6) C. (-1, -4, 5) D. (1, 3, 6)

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Mathematics