Need to know asap plz help

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

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.

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17