Daily Practice - Higher

29 students study Spanish and 9 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.

A box plot has minimum 11, lower quartile 15, median 22, upper quartile 25 and maximum 33. Work out the interquartile range.

Write √20 in the form a √b, where b is as small as possible.Write sqrt(20) in the form a sqrt(b), where b is as small as possible.

Solve x² + 15x + 56 = 0.Solve x^2 + 15x + 56 = 0.

y is directly proportional to x². When x = 4, y = 64. Work out y when x = 6.y is directly proportional to x^2. When x = 4, y = 64. Work out y when x = 6.