Hi I hope you can help me im struggling with this. ((: I'll give you a brainy thing if your right

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Percent increase and decrease. original number: 45 new number: 18