In a collection of coins consisting of only quarters and nickels, the total value is $1.80 and there are four times as many nickels as quarters. how many nickels are in the collection?

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

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?

Hundred and tens tables to make 430 in five different ways