Show your working for the following questions:
-18 divided by -3
two sevenths times eight thirds
three eights plus one twelth

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.

In a class of 77, there are 44 students who play soccer. if the teacher chooses 33 students, what is the probability that none of the three of them play soccer?