GRE
$$4x^{2}+1$$
$$(2x+1)^{2}$$
a
b
The percent of type S cars that do not contain anti-theft devices.
45%
AB
BC
$$\frac{(3a)(3a)}{3}$$
$$\frac{3a+3a}{3}$$
A length of a side of the square
$$x^{2}-1$$
The ratio of the number students enrolled in German classes to the number of students enrolled in Spanish classes
$$\frac{3}{4}$$
$$(\frac{y}{x})\sqrt{\frac{x^{3}}{y}}$$
$$\sqrt{xy}$$
The area of the square
The perimeter of the square
The circumference of a circle of radius r.
The arc length of a semicircle of radius (r + 1).
2 times the number of ways 4 books can be arranged on a shelf.
The number of ways 6 books can be arranged on a shelf
The probability of rolling a die and getting a prime number
The probability of rolling a die and getting an odd number
25000 +道题目
247本备考书籍
