Help help help me with maths

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

In triangle opq right angled at p op=7cm, oq-pq=1 determine the values of sinq and cosq

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?