To get a group discount for baseball tickets. Marco's group must have at least 20 people signed up. The group needs at least 7 more people. Which inequality show
how many have signed up so far?

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.