Rewrite the function F(x)=|x+1|-|x-1| In piecewise form. State it’s domain and range

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.

There are 85 apples on the big tree, john picked out 15%. how many did john pick out?

What is the answer to question 11? will give extra points! include a explanation (reasonable) for you : )