The formula for the volume of pyramid is,

Here, B is base area and height of pyramid.
The volume expression for group 4 is,

Here, expression,

represents the base area and 9 represent the height of pyramid.
So height of the pyramid created by group 4 is 9.
Answer: 9
Answer:
its true or 0
Step-by-step explanation:
The relationship is that the volume of a cube is equal to one edge length cubed or edge×edge×edge
Y=72 for the first option,as for the second one i don't know. Hope i helped on the first equation though :)
Answer:
7x + 7
Step-by-step explanation:
You add the numbers with x's
5x + 2x = 7x
Then just add the 7 to the 7x
7x + 7