(b) Beth multiplies a number by 3 and divides the answer by 10. By what fraction has the number been reduced?
(b)
[2]

Solve 3x-18=2y and 5x-6y=6 by elimination show work

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

How can constraints be used to model a real-world situation?