Mr. Joyce the school librarian is ordering new keyboards and mice for all of the schools computer labs each keyboard cost $13.50 and each mouse cost $6.50. There are three computer labs in the school and each computer lap has a computer station Pick all the expressions that represent how much Mr. Joyce will spend on new keyboards and mouse's Number one is3(13.50s + Yes6.50s) number two is 20.0 0S +3 number three is (13.50s+3)+(6.50s+3) number four is 3(20.00s) Out of the four with all the expressions that represent how much Mr. Joyce will spend on new keyboards and mouses

The correct expressions that represent how much Mr. Joyce will spend on new keyboards and mice are:

1. 3(13.50s + 6.50s)
3. (13.50s + 3) + (6.50s + 3)

So the correct answers are number one and number three.