6x3y2 + (-3x3y2) when simplified is: A. -18x3y2.
B. -3x3y2
C. 3x3y2
D. None of these choices are correct.

How are diamonds and graphite the same? how are they different? a. both diamonds and graphite are made entirely out of carbon. they are different because the carbon atoms are arranged differently with a more three-dimensional structure in diamonds and flat layers in graphite. b. both diamonds and graphite have atoms that are arranged with flat layers. they are different because only graphite are made entirely out of carbon. c. both diamonds and graphite have atoms that are arranged with three-dimensional structures. they are different because only diamonds are made entirely out of carbon. d. diamonds and graphite have no similarities. they are different because the carbon atoms are arranged differently with a more three-dimensional structure in diamonds and flat layers in graphite.

The establishment of columbia as the state capital was important because a) it was located in the heart of the upcountry. b) it was located in the heart of the low-country. c) it was already established as a vital industrial center. d) it represented a compromise location central to most citizens.

Select all that apply. if you lived in the olmec civilization you might have: 1) been amoung the first people on the planet to eat corn 2)worshiped a cougar deity 3)seen sculptures with downturned mouths and eyes 4)visited pyramids on a coastal island 5) made small figurines to put in trenches around the local temple