Julia spent $60 on a book. the cost of the book was $16 less than twice what she spent on a backpack. how much did the backpack cost?

2men and 7 boys can do a piece of working 4 days. it is done by 4 men and 4 boys in 3 days how long would it take for 1man or one boy to do it alone

Find the length of cu, the triangles are similar.

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.