#3: Determine whether the graphs of the given equations are parallel, perpendicular, or neither. *
x + y = 7
2x - 2y = 6

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax