Which triangle's unknown side length measures 7 units?

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

If i have one apple and give you the apple, how many apples do i have?

Find the area of the triangle shown 3 by 6