What adds to -8 but multiples to -9?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

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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.