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For a certain integer x, the units digit of (x+2)^2 is 9. Which of the following could be the units digit of |x+1|?

A. 0
B. 3
C. 4
D. 5
E. 7

If  x + 1/x= 2 , what is the value of x^9+1/x^9

A. -2
B. -1
C. 1
D. 2
E. 4

x - y = 3
2x = 2y + 6

The system of equations above has how many solutions?

(A) None
(B) Exactly one
(C) Exactly two
(D) Exactly three
(E) Infinitely many

How many real roots does x^4 - 2x^2 + 1 = 0 have?

A. 0
B. 1
C. 2
D. 3
E. 4

How many real roots does the equation x^2y+16xy+64y=0, Have if y < 0?

A. 0
B. 1
C. 2
D. 3
E. Infinite

­If |x+2| = |x|, how many values of x satisfy this equation?

A. 0
B. 1
C. 2
D. 3
E. 4­

Four packages have an average weight of 10.5 pounds. What is the minimum possible weight of the heaviest package in pounds if the median is 10 pounds?

A. 10
B. 10.5
C. 11
D. 12
E. 13

What is the sum of all possible solutions of the equation |x + 4|^2 - 10|x + 4| = 24?

A. -16
B. -14
C. -12
D. -8
E. -6

If x^2 + y^2 = 100, and x≥0, and y≥0, the maximum value of x + y is

A. Less than 10
B. Greater than or equal to 10 and less than 14
C. Greater than 14 and less than 19
D. Greater than 19 and less than 23
E. Greater than 23

If f(x) = 5x^2 and g(x) = x^2 + 12x + 85, what is the sum of all values for k such that f(k + 2) = g(2k)?

A. -8
B. -4
C. 4
D. 8
E. 65