Solve the equation: -3(2x-8)= -60

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Which of the following is true for the relation f(x)=2x^2+1

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?