What is the expression in factored form? -9.4 (15) + (12.3) (-9.4)
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What is the missing constant term in the perfect square that starts with x^2 -20x

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?

Solve 13 + w/7= -18 (w/7 is a fraction)