Physics

A jetliner flies west 2,000 miles from Chicago you San Francisco. It has an average speed of 635 mph relative to the air. What is the velocity of the jetliner relative to the earth of the wind is blowing at 160 mph from the west to the east?

475 mph, east
475 mph, west(my guess)
795 mph, west
795 mph, east

A hot air ballon rises vertically at a constant rate of 8 m/s. A second hot air balloon descends passed the first hot air balloon at rate of 12 m/s relative to the first hot air balloon. What is the velocity of the second hot air ballon relative to the ground?
4 m/s, Up
20 m/s. Up
4 m/s, down
20 m/s, down(my guess)

A hot air balloon rises vertically at a constant rate of 8 m/s. A second hot-air balloon moves past the first hot air balloon at 3 m/s downaward relative to the first hot air balloon. What is the velocity of the second hot air balloon relative to the ground?
5 m/s, up(my guess)
5 m/s, down
11 m/s, Up
13 m/s, down

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