I'll give brainliest if u are right​

What are the domain and range of f(x)=[1/5]x

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.