Which describes the cross section of the cube that passes through the vertices A, B, and C shown below? A cube. The cross section is a triangle.
a rectangle that is not a square
a square
a triangle with three equal sides
a triangle with only two equal sides

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.