Idont know how to factor !

factor 2x+4

In what form is the following linear equation written y=9x+2

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?