Pens are sold in packs of 6 and rulers are sold in boxes of 10. A teacher buys p packs of pens and r boxes of rulers. Write an expression for the total number of pens and rulers bought.

Use FOIL to remove a pair of brackets then simplify by collecting like terms. Factorising an algebraic expression Factorising an expression is to write it as a product of its factors. There are 4 ...