Please help with this maths on math watch! It’s roots and surds i think this includes rationalising the denominator but i have absolutely no idea which is why i need help!!

Which of the following statements is not true? a. parallel lines are lines in the same plane that never intersect. b. congruent figures have the same shape and same size angles and sides. c. similar figures must have the same shape and the same size. d. a rotation is when you turn a figure around a certain point.

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.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !