A convex polyhedron has (8a) faces, (6a+6) vertices, and (15a) edges. What is the value of a? Euler’s formula: V + F = E + 2

a = 2
a = 3
a = 4
a = 5

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !