the perimeter of the rectangle below is 42 inches. set up an equation and solve. the length is 5x and the width is x-3

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.