The number of roses (r) in a garden increases when the number of weeds (w) decreases. write the correct equation for this scenario, and solve for the number of roses when there are 5 weeds. weeds roses 10 20 20 10

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