Use the laplace transform to solve the given system of differential equations. dx dt = 2y + et dy dt = 18x − t x(0) = 1, y(0) = 1

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.