How many points can opposite rays have in common

Ascuba diver was 80 feet below sea level and swam up at a rate of 4 feet per minute. the two solutions show how long it took the scuba diver to reach an elevation of 20 feet below sea level. lydia and max used the methods shown below to find the time it took the diver to reach the new elevation.

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.