The cost of 3 pounds of grapes is $6.57 whats the constant proportionality that relates to the cost in dollars ,y, to the number of pounds of grapes ,x?

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

In 2000 the average price of a football ticket was $48.28. during the next 4 years, the proce increased an average of 6% each year.a) write a model giving the average price (p), in dollars, of a ticket (t) in years after 2000.b) graph the model. estimate the year when the average ticket price was about $60

The sales tax for an item was $8.40 and it cost $420 before tax. find the sales tax rate. write your answer as a percentage.