If a polyhedron has 5 faces and 7 vertices, then it must have how many edges? Please show step-by-step work

10 edges

Step-by-step explanation:

we know that

The Euler's formula state that: In a polyhedron, the number of vertices, minus the number of edges, plus the number of faces, is equal to two

in this problem  we have

substitute the given values

solve for E

Combine like terms in the left side

subtract 12 both sides

Multiply by -1 both sides

step-by-step explanation:

on a coordinate grid, point a is at (−4.0, −2.4) and point b is at (4.0, −2.4). point b is a reflection of point a across the –axis. input either a lowercase x or i think is the right awnser

step-by-step explanation: