Please help.

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

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.

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply