The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
How to solve a linear system with three unknowns using substitution (Question 2 of 2)