Eight-tenths gran of a chemical is put into each jar. how many jars can be filled with 192 grams of the chemical?

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Which of the following are accepted without proof in a logical system? check all that apply.

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?