Plz i need help f(x) = |-3x^2 + 48| + -13

What is the simplified expression for 6(2(y+x))

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

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion