Simplify the expression.

(7 – c )(–1)

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.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.