The average of a set of 10 numbers is 6. nine of the numbers are as follows: 3,4,5,6,7,10,1,3,12. what's the tenth number?

2x+3y=12 x-y=6 solve the following system equations

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

Factor the expression using the gcf. the expression 21m−49n factored using the gcf