5(x + y)2 + (x + y) − 4

Can you guys plz answer this question in order and quickly plz i will give 30 points

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. after tax the total is 45.99. what percentage of the subtotal is the total?

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid