If x2 + nx + 18 = (x + 9)(x + 2), what is the value of n?
1 answer:
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Answer and Step-by-step explanation:
Decreased by 20%
Answer:
triangular pyramid
Step-by-step explanation:
Let's make the central triangle the "base", or the bottom face, of our polyhedron. Try to visualise what will happen if we fold up the three triangles so that their top vertices meet at the center top (see diagram).
If we can do that, we'll see that it's a pyramid with a triangular base, so it's a triangular pyramid.
