Help I’m literally so confused this makes no sense

The square root of 9x plus 7 plus the square rot of 2x equall to 7

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.

To decrease an amount by 16% what single multiplier would you use