👉🏼 Solve 3 < 2x + 1 < 19

👈🏼 Show that the equation x³ + 5x = 4 has a solution between x = 0 and x = 1

🖐🏼 What is the size of angle y in the diagram below?:

👆🏼 Solve the following simultaneous equations:
3x + y = 19
2x + 3y = 8

👇🏼 Shown below is a prism that is 1m long. The cross section of the prism is a semicircle on top of a rectangle. Calculate the volume of the prism (to 1 decimal place):