verify the equivalence of your combined expression (4b) and the given expression (8b-4b) by evaluating both at the given value of b =5

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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.