It takes 3 hours for a boat to travel upstream against the current and tames 1.8 hours to travel the same distance downstream with the current. What is the speed of the boat in still water if the speed of the current is 3 mph?

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

yes i do see that. i say this because i am doing my very best in high school so i can get a scholarship and credits.  

i am so sorry , i have no idea but i want points so i won't be a beginner anymore