Which decimal is equal to this fraction​

How to write 3 tenths and 5 tenths as a decimal

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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