Why did new england delegates meet at the hartford convention?

Which events are correlated but do not necessarily have a causal relationship?

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

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