The mean mark for the test was 70% there were 30 students in the class, 20 whom were boys
the mean mark for the boys in the test was 62%
work out the mean mark for the girls

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.

The graph represents this system of equations: 2x + y = 3 2x - 5y = 15 what is the solution to the system of equations represented by the graph? (0, -3) (1,1) (1.5,0) (2.5, -2)

What is the inverse of the function below? f(x)=x/3-2