Find the lateral surface area.

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

How do you use the elimination method for this question? explain, because i really want to understand!