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Human circulation is a closed system that may be divided into systemic and pulmonary circulation. The first one is a loop from the heart to the body. The second one is a loop from the heart to the lungs. ...

The important concept here is that in order to add or subtract fractions, they must have a common denominator. The easiest way of finding a common denominator for three or more fractions ...

3 Mehods:Step 1: Does the function factorise. In this case yes it does. giving y=(2x+1)(x-4)Method: Find the factors of the contract in this case (4). Which are (2,2) , (4,1)We know that a quadratic must ...

(2n + 1) ² - (2n-1)can also be written be as (2n +1)(2n + 1) - (2n-1) Two brackets next to each other indicate that you must multiple them by each other, this is also known as expanding the bra...

HCl, due to chlorine electronegativity, is a polar molecule. This causes dipole-dipole interactions between molecules that need to be overcome for the molecules to boil. Water also has dipole interactions...