Fast with simple 6th grade question need fast

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.

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?