Factor x^4 - 8x^3 + x^2 by finding the greatest common factor

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

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

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?