Is "The radio's sound died down" a metaphor, personification, onomatopoeia, or oxymoron answer quick

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

What is the inverse of the function f(x) = 2x + 1?

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?