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190302	AB//CD. ∠BAD=45°, ∠BCD=60°, BC=CD=6. AB=?
Ready4	How many 5-digit multiples of 3 can be formed using only the digits 0, 1, 2, 3, 4, and 5, without repeating any digits?
	The smallest prime factor of 899 is x. Which of the following is true of x?
200301	There is a rectangle. The sum of the areas of which two parts is the same as the sum of the areas of part 2 and part 8?
PREP07 Test 2	If the operation @ is defined for all positive integers x and w by x @ w = $$(2^x)\over(2^w)$$ , then (3 @ 1) @ 3 =
Magoosh	If an object travels 100 feet in 2 seconds, what is the object's approximate speed in miles per hour? (Note: 1 mile = 5280 feet)
OG18-数学分册	If the volume of a ball is 32,490 cubic millimeters, what is the volume of the ball in cubic centimeters? (1 millimeter = 0.1 centimeter)
	While BabyCare is currently accomodating 30 babies per month, it is contemplating improving its quality of service or increasing the number of babies it cares for in order to increase profit. Currently, management is trying to determine whether to run its business at a 20-baby maximum or at a 50-baby maximum.Which of the following pieces of information would increase the total cost per baby of running a 50-baby maximum day care center versus a 20-baby maximum day care center. Assume the business runs at full capacity and it is not eligible for any bulk discounts for the month of February.
OG18-数学分册	Which of the following must be equal to zero for all real numbers x ?I. $$-\frac{1}{x}$$II. x + (- x)III. $$x^{0}$$
190215	The two sides of the square poster are parallel to the horizontal line. The side of the poster is 54 inches long. The part of the poster that is higher than one line which is 5 feet 9 inches from the ground accounts for 1/3 of the area of the square. What's the height from the bottom of the poster to the ground? (1 foot = 12 inches)
Magoosh	If the average (arithmetic mean) of seven consecutive integers is k + 2, then the product of the greatest and least integer is
Ready4	For how many values of $x$ does $x^{4}-4x^{3} + 4x^{2}=0$ ?
PREP07 Test 1	Which of the following inequalities has a solution set that, when graphed on the number line, is a single line segment of finite length?
Magoosh	The points A(0, 0), B(0, 4a - 5) and C(2a + 1, 2a + 6) form a triangle. If ∠ABC=90°, what is the area of triangle ABC?
OG19-数学分册	The sum S of the first n consecutive positive even integers is given by $$S = n(n + 1)$$. For.what value of n is this sum equal to 110 ?
Ready4	If $x (\frac{5 n + 1}{3}) = x$ and $x \neq 0$ , then $n =$
Ready4	If non-negative integers $s$ and $t$ are not both even, which of the following must be even?
Magoosh	In the xy-coordinate system, points (2, 9) and (-1, 0) lie on line k. If the point (n, 21) lies on line k, what is the value of n?
Ready4	A passenger is planning a trip that involves three connecting trains that leave from Stations A, B, and C, respectively. The first train leaves Station A every hour, beginning at 6:30 a.m., and arrives at Station B $<font color='#FE8080'>1</font>\frac{<font color='#FE8080'>1</font>}{2}$ hours later. The second train leaves Station B every hour, beginning at 7:30 a.m., and arrives at Station C $2\frac{3}{4}$ hours later. The third train leaves Station C every 30 minutes, beginning at 9:00 a.m. What is the least total amount of time the passenger must spend waiting between trains if all trains keep to their schedules?
	The increase in the estimated year-end population of Territory C from 1990 to 2010 accounts for approximately % of the increase in the estimated year-end population of Nation X over the same period.In 2010, the estimated total year-end population of the 3 territories was of the estimated year-end population of Nation X.