[img]2014m5x/ct_egreqm_egreqjs_0148_20135[/img]In the figure above, RS= ST and

游客2025-02-24 32

问题

In the figure above, RS= ST and the coordinates of S are(k,4). What is the value of k?

选项 A、-4
B、-2
C、0
D、2
E、4

答案 A

解析 The correct answer is A. To solve this problem, you need to know how to graph xy-coordinates. Because point k is in the upper left quadrant, it must be negative. Eliminate answer choices C, D, and E. You are given that RS = ST. Because the coordinates of S are(k, 4), RS must equal 4 units. Therefore, ST must equal 4 units, and point S must be 4 units to the left along the x-axis. The x-coordinate, k, must be -4.

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[img]2014m5x/ct_egreqm_egreqjs_0148_20135[/img]In the figure above, RS= ST and

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[img]2014m9x/ct_egreqj_egreqjs_0023_20148[/img]Thefigureaboveshowsthegraph

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