Which type of climate is experienced in the northern countries of south america

What is the name for the main idea behind the settling of western lands by americans in the early-1800s?

Jane determines x = 4 and y = 1 is the solution to the following system of equations.

Plz me in 1756 george washington was sent on a mission to, a. build a fort at the point where the allegheny and monogahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio valley.