What positive impact did Elijah McCoy have on the US

Elijah McCoy (1843?-1929) made important contributions to the design of railroad locomotives after the Civil War. He kept pace with the progress of locomotive design, devising new lubricating systems that served the steam engines of the early twentieth century.

Explanation:

Elijah McCoy (1843-1929) made important contributions to the design of railroad locomotives after the Civil War. He kept pace with the progress of locomotive design, devising new lubricating systems that served the steam engines of the early twentieth century.

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

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