3t+40=A
he starts with 40, so you add that to 3 t (3 meters every year-t)
2 students have both their nose and ears pierced
Given:
Planes X and Y are perpendicular to each other
Points A, E, F, and G are points only in plane X
Points R and S are points in both planes X and Y
Lines EA and FG are parallel
The lines which could be perpendicular to RS are EA and FG.
