1、GRE（ QUANTITATIVE）练习试卷 2及答案与解析 1 What is the distance between the points (3,-4) and (9,4)? 2 Solve for y if the distance between the two points (2,8) and (-6,y) is 17. 3 What is the midpoint between (12,5) and (10, -7)? 4 Solve for x if the midpoint between the two points (x,1) and (-2, -3) is (5,-1
2、). 5 What is the distance between the points (0,5) and (5,0)? GRE（ QUANTITATIVE）练习试卷 2答案与解析 1 【正确答案】 Use the Distance Formula to solve this problem. Substitute the given values of x and y into the formula to solve for the distance, as follows: 2 【正确答案】 Use the Distance Formula to solve this problem.
3、 Because you are given the distance between the points, your equation will look like this: Square both sides and solve for Y2: 289=(-8)2+(y2-8)2 289=(64)+(y2-8)2 225=(y2-8)2 15=y2-8 23=y2 3 【正确答案】 Use the midpoint equation to solve this problem. First solve for the x-coordinate, which is half the di
4、stance between 12 and 10: Do the same for mm, which is half the distance between 5 and -7: Therefore, the midpoint is (11,-1). 4 【正确答案】 You only have to solve for the x-coordinate because you are given the y-coordinate: 5 【正确答案】 Use the Distance Formula to solve this problem. Substitute the given values of x and y into the formula to solve for the distance, as follows:
