Search over 10,000 free study notes

So "ser" and "estar" both mean "to be".Ser should be used when you're talking about an intrinsic quality of something eg. a description, the time, a characteristic of something ...

In order to write a high quality essay question it needs to contain some key elements. To make a good impression to your examiner you need to start with a good but concise introduction to introduce some of t...

Equation 1) x 2 + y 2 = 25 Equation 2) y - 3x = 13 First you need to substitute a variable so there is only one unknown in the equation: 2) y = 13 + 3x Substituting this into equation 1) gives: x 2 + (13 + 3...

So first you need to multiply out the brackets so you can simplify the equation. Remember the acronym FOIL: First, Outer, Inner, Last.10w^2 + 35w - 12w - 42 And then you need to simplify 10w^2 + 23w - 42

The alveoli are covered by a rich blood supply of capillaries- this provides a diffusion gradient for oxygen to move into the blood and carbon dioxide to move into the lungs.The alveoli are also highly folde...