Matrices 2 Recap Identity and zero matrix Using algebra Card match Setting up homework/test

Recap

Coke costs 50p a can and crisps cost 40p a packet. Student A buys 1 can of coke and 2 packets of crisps. Student B buys 3 cans of coke and 4 packets of crisps. Represent the above information as a product of two matrices giving an answer which represents to total amount each student has spent. Student A Student B cokecrispsprices Total amount spent =

Identity and zero matrix

Practice questions

q8 page 35 The matrices A and B are given by Show that AB = BA = where x and y are to be found in terms of p, q, r, and s

Using a calculator