Subtracting decimals

3.534 - 3.1 =

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

Write as a product: ac^2–ad+c^3–cd–bc^2+bd