The length of a rectangle is nine inches less than twice the width. if the perimeter of the rectangle is 84 inches, find the dimensions of the rectangle

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.