来源：

题目： In a certain sequence, the term tn is defined as$$t_n = 3t_{n-1} - 2t_{n-2}$$ for all n > 2. If $$t_1 = -2$$ and $$t_2 = -1$$ , then $$t_4 =$$

来源：

题目： $$({{3}^{-1}-2^{-1}})^{-1}$$

来源：

题目： In the coordinate plane, Line H has a positive slope, and Line J never passes through the first quadrant. Which of the following could be true?I. line J is perpendicular to line HII. line J is parallel to line HIII. line J intersects line H on the x-axis

来源：

题目： $$\sqrt{839} $$is between

来源：

题目： What is the Greatest Common Factor (GCF) of $$18x^{8}y^{20} and 24x^{12}y^{15}$$?

来源：

题目： For which of the following functions is $$f(-\frac{1}{2})$$ $$\gt$$f(2)?

来源：

题目： For all positive numbers x, Δx is defined as the cube root of x, and ∇x is defined as the square root of x. If$$ ∇(Δk) = m^{2}$$ , then k =

来源：

题目： If 100,000 microns = 1 decimeter, and 1,000,000,000 angstroms = 1 decimeter, how many angstroms equal 1 micron?

来源：

题目： The microcurrent through the electrode in a delicate circuit is usually held constant at $$3.6 * 10^{–8}$$ amps. Because of a defect in another part of the circuit, the current was 1000 times smaller. What was the current, in amps, caused by this defect?

来源：

题目： If $$ W=\sqrt{\frac{1}{16}},x=(\frac{1}{100})^\frac{1}{3}and y=(\frac{1}{4})^{-2}then$$

来源：

题目： Point A in the xy-coordinate system is shown below. Given two other points B (4a, b) and C (2a, 5b), what is the area of triangle ABC in terms of a and b?

来源：

题目： Line P has a positive slope and a positive y-intercept. Line Q also has a positive slope and a positive y-intercept. The two slopes and the two y-intercepts are four different numbers, none equal. Lines P & Q have a single intersection point --- what is the full set of possible quadrants in which the intersection point could be?

来源：

题目： When positive integer k is divided by 1869, the remainder is 102. What is the remainder when k is divided by 89?

来源：

题目： If the retail price of a shirt is R dollars, and the price including sales tax is T dollars then the sales tax, as a percent, is

来源：

题目： A certain barrel is$$\frac{1}{5} $$full. When k liters of liquid are added to the barrel, it becomes$$\frac{ 2}{3}$$ full. In terms of k, what is the capacity of the barrel, in liters?