1.If X is a positive number less than 10, is Z greater than the average(arithmetic mean)of X and 10? (1)On the number line,Z is closer to 10 than it is to X (2)Z=5X 答案是A,可是我觉得不可能啊,Z可以再10和X的中点的左边和右边,所以应该是不能单独判断的吧。 2.Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?
(A) 50+I/200 (B) 50+3I/100 (C) 50+I/40 (D) 100+I/50 (E) 100+3I/100 这题我是完全不理解题目意思, 惭愧啊,希望好心人帮忙解释一下吧,谢谢! |