help if you know it pls don't use this as a opportunity to get points cause I really need the right answers for this test or I will fail the quarter.

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Find the value of x. give reasons to justify your solutions! c ∈ ae