Amaths teacher bought 40 calculators at $8.20 each and a number of other calculators costing $2.95 each. in all she spent$387. how many of the cheaper calculators did she buy?

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online