If a polyhedron has 5 faces and 7 vertices, then it must have how many edges?
A) 8
B) 10
C) 12
D) Other: (give number please)

a polyhedron has 5 faces and 7 vertices has 15 edges

Step-by-step explanation:

but if you are talking about a polyhedron

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

60

step-by-step explanation: