I do not understand what I'm supposed to do

Which value of c would make he following expression completely factored? 8x+cy

Iwill give brainliest only if your correct the words subsequent and submerge both contain the prefix sub. based on this information, what does the prefix sub most likely mean? a) under or secondary b) true or verifiable c) tricky or difficult d) around or centered on

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