Evaluate the expression without using a calculator.
-2/3
A. 512
B. -4
C. 
D. 4
Answer: D
Mathematics
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Write the number in standard form.One millimeter is equal to 1 × 10-6 kilometers.
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A. function B. not a function
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Solve the system by graphing.2x + y = 1 x + 3y = -12
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Mathematics