Pls help urgently extra points and mark brainlist it’s easy reading

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

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length