Which fact does not support the claim the social and economic differences between the north and the south caused the american civil war?

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

Apopulation of bolts has a mean thickness of 20 millimeters, with a population standard deviation of .01 millimeters. give, in millimeters, a minimum and a maximum thickness that includes 68% of the population of bolts.

Saul reaches out to grab a pot of boiling water and something in his body sends a sensation to his brain to warn him of the heat coming from the handle. what organ is responsible for protecting saul from the heat?