X=2y-2 and 3y=x+6 using substitution

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.

What does x = in this equation x+3+2x=x+5

The quadratic function h(t)=-16.1t^2+150 choose the graph representation