Probability in table- unknown values

Probability in table- unknown values

Integrating in the form sec^n x tan x

Using the identity tan^2x = sec^2 x - 1

Finding values which satisfy two quadratic inequalities

Finding Upper and Lower bounds of a number rounded to 2sf

Writing a quadratic in the form (ax+b)^2 + c

Completing the square, negative coefficient of x^2

Expanding two linear brackets and simplifying

Solving a modulus equation by squaring

Perimeter of an L shaped compound shape

Area of a compound shape

Calculating an unknown from a frequency table using the mean