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$$x^{2}$$ = x

Quantity A

$$3^{x}$$

Quantity B

$$3^{-x}$$


Solve the equation $$x^{3}$$-2$$x^{2}$$-5=$$x^{2}$$(x+3+10$$x^{-1}$$), and the solution is x=
What is the sum of all possible solutions to the equation below?

$$\sqrt{2x^{2}-x-9}$$ =x+1
How many ordered pairs of positive integers (x, y) satisfy the inequality 2x+3y < 10?
n is an integer, and k is not an integer.

0 < k < n < k+2

Quantity A

n

Quantity B

k +1


z=x+2y

If x stands for integers from 30 to 39, inclusive, and y stands for integers from 20 to 29, inclusive, then the tens digit of z could be?

Indicate all such possible values.
If x + y ≠ 0, which of the following is a solution to the inequality below?

Indicate all such pairs.

$$\frac{x^{2}-y^{2}-1}{x+y}$$ > $$\frac{-1}{x+y}$$
1 < $$x$$ < 2

Quantity A

$$x$$ +$$x^{-1}$$

Quantity B

2


x > 0, y > 0

Quantity A

$$\sqrt{xy}$$

Quantity B

$$\frac{x+y}{2}$$


$$\frac{1}{a}$$ +$$\frac{1}{b}$$ =$$\frac{1}{c}$$, a+b=20, a, b, c are all positive. The value of c could be?

Indicate all such values.
The total amount that Mary paid for a book was equal to the price of the book plus a sales tax that was 4 percent of the price of the book. Mary paid for the book with a $10 bill and received the correct change, which was less than $3.00. Which of the following statements must be true?

Indicate all such statements.
20 boys and 40 girls are in Group A, while at least 7 boys, together with some girls are in Group B. To choose one person from each of the group, the probability that both are boys is no greater than $$\frac{1}{15}$$. Which of the following statements must be true?

Indicate all such statements.
If f(x)=2x+1, g(x)=2f(x)+1, then what is the value of g(2)?


The figure above shows the graph of the function f in the xy-plane. What it the value of f(f(-1))?


Which of the following functions f defined for all numbers x has the property that f(-x)=-f(x)?
a is the sum of the second and third positive integer multiples of a.

Quantity A

5

Quantity B

15




(77△56)△81=?
How many points (x, y) lie on the line segment between (22, $$\frac{38}{3}$$) and (7, $$\frac{53}{3}$$) such that x and y are both integers?
Line l passes through points in both quadrants II and III. Which of the following statements are true?

Indicate all such statements.
The coordinates of three points in an x-y rectangular coordinate system are (0,3), (3,3b) and (b,3) respectively (b is a constant). If the area of the triangle is 18 when connecting the three coordinates, then b equals?

Indicate all such possible values.

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