Daily Practice - Higher Plus

A histogram has two bars: one 5 units wide with frequency density 2.5, one 25 units wide with density 0.8. How many values in total?

x = 73 and y = 28, each correct to the nearest whole number. Work out the upper bound of x - y.

Solve x² + y² = 625 and y = x - 17 simultaneously.Solve x^2 + y^2 = 625 and y = x - 17 simultaneously.

y is directly proportional to x². When x = 3, y = 72. Work out the positive value of x when y = 200.y is directly proportional to x^2. When x = 3, y = 72. Work out the positive value of x when y = 200.

In a circle theorem proof, a step uses the fact that two angles at the circumference stand on the same arc. State the reason being quoted.