Which of the following is equivalent to 3x−3 ? A. x+x+x−1−1−1
B. x+x+x+1+1+1
C. x−x−x−1−1−1
D. x+x+x−1+1+1

, A

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

step-by-step explanation:

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