Cuánto es la ecuación 5x +6 =21

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

Aline that intersects one of two parallel lines intersects the other also always sometimes never

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?