Which expressions are equivalent to 4(4x + 2y + x − y)?

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Consider the function y = f(x)=3^x the values of f(1/2) and f(1/4). rounded to the nearest hundredth, are__and__ respectively

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.