How many edges and vertices are there for an octahedron, which is a polyhedron with eight congruent triangular faces? what are the steps in solving this?

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint

What is the the area of this triangle expressed as a monomial?

The tax rate on harriet walker's 80,000 vacation home is 20 mills. the property is assessed at full value. how much will harriet walker's pay in taxes this year