展开全部

题目列表

题目内容
The average (arithmetic mean) of x , y and 15 is 9.

Quantity A

Average of x and y

Quantity B

16


W, X, Y and Z each represent a different number. If the sum of each column is shown beneath that column, and the sum of each row is shown beside that row, then n = GRE、gre题库、gre模考、gre考满分
The system of equations has how many solutions?

3x - 6y = 9

2y - x - 3 = 0
The average (arithmetic mean) of y numbers is x. If 30 is added to the set of numbers, then the average will be x - 5. What is the value of y in terms of x ?
If |x + 5| = 3 and $$\frac{|2y-1|}{3}=5$$, then |x + y| could equal each of the following EXCEPT
If f(x) =$$12-\frac{x^2}{2}$$ and f(2k) = 2k, what is one possible value for k?
If A, B, C and D are positive integers such that 4A = 9B, 17C = 11D, and 5C = 12A, then the arrangement of the four numbers from greatest to least is
If 3x < 2y < 0, which of the following must be the greatest?
If$$x^{2}+y^{2}=12$$, then $$\frac{x}{y}+\frac{y}{x}=$$
If xy = 7 and x - y = 5, then $$x^{2}?+y^{2}?=$$
$$If \frac{8-x}{x+1}=x,then x^{2}+2x-3=?$$
If A is the initial amount put into an account, R is the annual percentage of interest written as a decimal, and the interest compounds annually, then which of the following would be an expression, in terms of A and R, for the interest accrued in three years?
When positive integer x is divided by 11, the quotient is y and the remainder is 4. When 2x is divided by 8, the quotient is 3y and the remainder is 2. What is the value of 13y – x ?
$$If (\frac{1}{x}+x)^{2}=16$$,then $$\frac{1}{x^{2}}+x^{2}=$$
If 5x - 3y = 7 and 2y - 4x = 3, then 2x - 2y =
For all numbers a and b, the operation is defined by a ⊕ b = $$a^2 - ab$$. If xy ≠ 0, then which of the following can be equal to zero?

I. x ⊕ y

II. xy ⊕ y

III. x ⊕ (x + y)
$$If 8^{n+1}+8^{n}=36$$,, then n =
If f(x) = 5 - 2x and f(3k) = f(k + 1), then f(k) =
What is the sum of all possible solutions of the equation

$$|x+4|^{2}-10|x+4|=24$$
What is the sum of all possible solutions to the equation

$$\sqrt{2x^{2}-x-9}=x+1$$
1 2 ... 38 39 40 41 42 43 44 ... 54 55

共收录:

25000 +道题目

136本备考书籍

最新提问