Please help due in a hour 20 points

What is the 12th term of b(n)=-4-2(n-1)

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

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.