Which technological breakthrough did orville and wilbur wright achieve in 1903?

a. they designed a hot-air balloon that crossed the english channel and landed in france.

b. they constructed a kite in dayton, ohio, and then safely carried a man to an altitude of 500 feet.

c. they built a seaplane that carries five sacks of u. s. mail across tampa bay in florida.

d. they flew an airplane with a gasoline-powered engine at kitty hawk, north carolina.

The correct answer is C. Orville and Wilbur Wright flew an airplane with a gasoline-powered engine at Kitty Hawk, North Carolina, in 1903.

Explanation:

The Wright brothers, Wilbur and Orville, were two aviators, engineers, inventors and pioneers of aviation, generally named together, and recognized worldwide as those who invented, built and flew the world's first airplane.

When launched into the air with an external catapult, a short flight was achieved, enough to test the turn and control system of the aircraft. It is stated that their first flight was made on December 17, 1903, in Kitty Hawk, aboard the Flyer I.

first paragraph (and busy all the night ,with a silence deep and white )

1.3x - 2 - (3.3x + 5) = 2x + 1

1.3x - 2 - 3.3x - 5 = 2x + 1

-2x - 7 = 2x + 1

-7 = 4x + 1

-8 = 4x

x = -2