Answers by Javier Vidal
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Answers by Javier Vidal

Answers by Javier Vidal
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Near the earth’s surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air.
answered Jun 2, 2018
3 votes
233k views
Lisa is 4 years older than three times her brother Sammy’s age. Let s represent Sammy’s age and l represent Lisa's age. Which expression represents Lisa’s age? A. l = 3s + 4 B. l = 4s + 3 C. l = s + 4
answered Nov 16, 2017
5 votes
144k views
Explain how heredity and family medical history can play a role in an individual’s personal health. Include examples in your explanation. I have an idea, but I am not sure though.. Help me please!
answered Sep 12, 2017
7 votes
51.0k views
Map showing Viking Raids and Settlements, between 789 CE (A.D.) and 1043 CE (A.D.) The map shows Danish Vikings moving south from Denmark, raiding and settling in England and France, and staging raids
answered Mar 25, 2017
5 votes
204k views
What is 5/16 as a percent
answered Apr 7, 2016
3 votes
195k views
How do volcanoes change the surface of the earth
answered Feb 15, 2015
2 votes
21.2k views
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