What integer can be represented by 15 positive tiles and 16 negative tiles?

Write a recursive sequence that represents the sequence defined by the following explicit formula:

Assume cd | ab are parallel. find m2. a) x= 50° (b) x = 70° c) x = 30° d) x = 60

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.