GRE Exam Numerical Ability Algebra

If |-3x+1| < 7, then which of the following represents all possible values of x ?
A) -2 < x B) -2 < x < 8/3 C) -2 ≤ x ≤ 8/3 D) x < -2 or x > 8/3

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GRE Other Question

Theresa is building a pyramid out of stacked rows of tin cans. When completed, the top row of the pyramid contains a single tin can and each row below the top row contains 4 more cans than the one above it. If the completed pyramid contains 861 cans, then how many rows does the pyramid has ? A) 41 B) 21 C) 42 D) 20 Each of the even-numbered terms in a certain sequence is formed by multiplying the preceding term by -1. Each of the odd-numbered terms in the sequence is formed by adding 3 to the preceding term. If the first term in the sequence is 3, then what is the 200th term ? A) -3 B) 0 C) 1 D) 3 E)1