If you answer this, could you just explain how to do it, rather than give an answer, please? Thx! Rewrite the expression without using a negative exponent.
Simplify your answer as much as possible.

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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?

Which of the following vectors are orthogonal to (2,1)? check all that apply