Add.-85 + (-70)

A. 155
B. 15
C. -15
D. -155


Answer: D

Mathematics

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A. - 
B. 256
C.
D. not a real number

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A. 12
B. 35
C. 12
D. 35

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Find the real solutions of the equation.x4 - 5x2 + 4 = 0

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