Daily Practice - Higher Plus

y is inversely proportional to x². When x = 2, y = 75. Work out y when x = 5.y is inversely proportional to x^2. When x = 2, y = 75. Work out y when x = 5.

A triangle has sides 16 cm, 15 cm and 7 cm. Work out the angle opposite the 16 cm side, to 1 decimal place.

A bag holds 7 red and n blue counters. The probability of taking a red is 7/10. Work out n.

A histogram has four 10-wide classes from 0, with frequency densities 1, 0.5, 3, 2. Which class contains the median?

A block has mass 610 g (to the nearest 10 g) and volume 6 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 610 g (to the nearest 10 g) and volume 6 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.