Đề thi Olympic Tiếng Anh lớp 11 vòng 17 năm 2013 - 2014

If f(x) = 2/(x + 3) and g(x) = 1/x , then (g ° f)(x) is equal to

If (x – 4) is a factor of x2 – x – w = 0, then the value of w is

Drawing a blue marble at random from a bag containing 3 red and 2 blue marbles is similar to the next free throw of a basketball player who on the average hits

The accompanying circle graph shows how the Marino family spends its income each month. What is the measure, in degrees, of the central angle that represents the percentage of income spent on food?

Which equation shows a correct relationship of the sides in ΔXYZ?

The expression 7/(2 - √3) is equivalent to

What is the relationship between x and y?

Jean's scores on five mathematics tests were 98, 97, 99, 98, and 96. Her scores on five English tests were 78, 84, 95, 72, and 79. Which statement is true about the standard deviations for the scores?

The graph of a quadratic function is shown above. Which statement about this graph is not true?

The graph of a quadratic function is shown above. What is the best estimate of the positive value of x for which this function equals 8?