8x2y2 – + 4x4 – 7xy3
a.–7xy3 + 8x2y2 – + 4x4
b.4x4 – 7xy3 – + 8x2y2
c.4x4 + 8x2y2 – – 7xy3
d.–7xy3 – + 8x2y2 + 4x4

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?

The bolo cavern outside of vandalia is 421 ft below sea level. a little more than75 miles away. mt owens is 7295 feet above sea level. what is the difference in elevation between the bolo cavern and mt owens?

Iknow the answer but the calculator doesn't seem to give the right one