The cost for each soda is $1.50. If your friend Lawrence buys a certain number of Coca-Colas, c, and Mountain Dews, m, which answer choice shows an expression that represents the total cost of the Coca-Colas and Mountain Dews that Lawrence bought?

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