In exercises 11-13 use euler's formula f + v = e + 2 to find the number of faces, edges or vertices.
11. a prism has 6 faces and 8 vertices. how many edges does it have?
12. a pyramid has 4 faces and 4 vertices. how many edges does it have?
13. a pyramid has 8 edges and 5 vertices. how many edges does it have?

in mathematics, a constraint is a condition of an optimization problem that the solution must satisfy. there are several types of constraints—primarily equality constraints, inequality constraints, and integer constraints. the set of candidate solutions that satisfy all constraints is called the feasible set.

hoped i'm right lol