If two planes cross one another, then their intersection is two lines. true or false

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Which expression shows the sum of the polynomials with like terms grouped together