What is the length of a killer whale

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 of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left