Which expression is not equivalent to the other expressions? -6(2 x - 4)
-4(3 x + 6)
-(12 x - 6) + 18
-3(4 x - 3) + 15

Don't know how to find x given these segment lengths

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

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.