B . side is a 8.5 inches long and side is 7 inches long
50 is the value cause 20 is 40 of the percent, 20+20 is 40 now you made it into 80%.20% is remaining so add 10.
V = Displacement / Time
V = 5 m / 15 s
V = 1/3 m/s or 0.33 m/s
Answer:

Step-by-step explanation:
Solve by Substitution ;
