#### 题目列表

A rectangle is formed by increasing two opposite sides of a square of side length x by y units, and decreasing the two remaining sides of the square by y units. What is the area of the rectangle?
The net profit that Ann makes from selling x pillows is given by the expression $x^{2} – 2x – 288.$

#### Quantity A

The number of pillows that Ann must sell for her net profit to be zero

#### Quantity B

20

What is the greatest value of x for which (3x – 2)(x + 1) = 0 ?
$x^{2}=y^{2}+1$ and ${y}\neq{0}$

#### Quantity A

$x^{4}$

#### Quantity B

$y^{4}+1$

The solutions of $x^2$ + x – 20 = 0 are Indicate all possible values.
If x is positive and y is 1 more than the square of x, then what is the value of x in terms of y ?
$x^{2}-49=0$

#### Quantity A

$x^{2}-7x$

#### Quantity B

-7x+49

For $x\neq-2 and x\neq-4,\frac{x}{x+4}+\frac{-3}{x+2}=$
$a\neq-b$

#### Quantity A

$\frac{6a^{2}+12ab+6b^{2}}{a+b}$

6((a+b)

#### Quantity A

$(141)^{2}-(28)^{2}$

#### Quantity B

$(141-28)^{2}$

(–x + y)(–y + x) =
x ≥ 0y ≥ 0

#### Quantity A

$\sqrt{x^{12}}-y$

#### Quantity B

$(x^{3}+\sqrt{y})(x^{3}-\sqrt{y})$

#### Quantity A

$(s+t)^{2}$

#### Quantity B

$s^{2}+t^{2}$

$x^{2}-2xy+y^{2}=0$ and $y=\frac{9}{x}$

y

#### Quantity B

3

If $\frac{x^{2}-4x+4}{x^{2}+x-6}=\frac{6x-12}{x^{2}+6x+9}$, then x =__________
If y = $x^2$ – 32x + 256, then what is the least possible value of y ?
A certain recipe calls for 2 cups of sugar and $3\frac({1}{2})$ cups of flour. What is the ratio of sugar to flour in this recipe?
What is the approximate ratio of Company F`s average annual donation to charity group X for the period 1980–1990 to that for the period 1980–2000?
If a certain vitamin pill has 400 milligrams of magnesium, then how many grams of magnesium are in a bottle of 500 vitamin pills? (1 gram = 1,000 milligrams)
$a=\frac{1}{6} and \frac{6}{7}=\frac{5}{b}$,what is the value of a + b ?

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