GRE Exam Numerical Ability Algebra

If y^(-2) + 2y^(-1) – 15 = 0 which of the following could be the value of y.
(A) 3
(B) 1/5
(C) -1/5
(D) -1/3
(E) -5

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GRE Other Question

84210p31q then find the value of p and q? 3.7, 4.1, a, 8.5, 9.2, 2a
The six numbers shown are listed in increasing order. Which of the following values could be the range of the six numbers? Indicate all such values.
(A) 4.0
(B) 5.2
(C) 7.3
(D) 11.6
(E) 12.9
(F) 14.1