单项选择题

In the figure above, XY= YZ, and XZ is a diameter of the circle, having a length of 10 inches. What is the area of △XYZ, in square inches



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单项选择题
The larger of two numbers exceeds three times the smaller number by 2. The sum of twice the larger and 4 times the smaller is 73. If a is the smaller number, which equation below determines the correct value of x
A. 4(3a+2)+2a=73
B. 4(3a+2)+2a=73
C. (6a+2)+4a=73
D. 2(3a+2)+4a=73
E. 2(3a-2)+4a=73
填空题
In the last sentence of the first paragraph, the author is most likely suggesting that
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