Writing expressions

Question

Write an expression for the sequence of operations for:

triple r, multiply the result by t, then divide what you have by s

Answer 1

1. triple r means we have to multiply the r 3 times so that gives us 3r
2. multiply the result by t means that have to multiply our 3r by t so that gives us 3r·t
3. divide what you have by s means that we have to divide our 3r·t by s, so that gives us final 3r·t:s
4. you can also put 3r·t in brackets and then :s.... (3r·t):s