The distance from the center of a tire to the edge is 4 inches. How far will the tire rotate in 3 rotations

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

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?