Please help im really stuck

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Issof claims that the scale factor is 1/2. which statement about his claim is correct

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex