Before lava reaches the surface, the molten material is called
a.
rock.
b.
magma.
c.
volcanic ash.
d.
liquid fire.

can any one me? ?

What is the difference between regular convex and concave polygons

Which of the following statement about pascal's triangle are true?

You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2