Examine the system of equations. -3x + y = 9,
2x + 4y = 8
Which variable is most efficient to isolate?

Three coins are flipped. what is the probability that there will be at least two tails?

Evaluate the following expression 1/3^2

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.