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INTRO - Tsar, 1855-81. Attempts to modernise an empire lagging behind the major powers of the mid to late 19th century. Why? How? What were Alexander’s true intentions?

Why? Did Alexander embark on...

The expression (2x+5) has the same value as y, and so we can use (2x+5) instead of y in the second equation. This means that we are now just dealing with one variable (x) instead of two (x and y). If we m...

Be genuine! Chances are the interviewers have heard something similar to what you will say (e.g. I'm a great team player, I love human biology, I really care about people) BUT the key is to provide eviden...

Firstly, we can see a difference in the letters, DNA has a D whereas RNA has an R, when we think about the full names we come to deoxyribose and ribose, which correspond to the different sugar molecules f...

a² = 3² = 9, b² = 4² = 16, a² + b² = 3² + 4² = 25, c² = 25, c = 5