Arhombus has a perimeter of 217cm. how do i find the length of each side?

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

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?