I suck at math anybody willing to help me thru it all ? And please answer this it’s due now

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

Benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'