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There a couple of helpful ways to remember historical dates. One way I used during my GCSE's was to make a song out of the relevant dates and events for each topic. This way enables you to replay the song...

All three are types of averages that we can calculate.1, 1, 4, 6, 8, 12, 17
We can calculate the mode by looking at which number is the most frequently occurring number, for example, with the above d...

To form this you begin with the infinitive of the verb eg. hablar (to speak), comer (to eat), vivir (to live). You then take off the -ar, -er, or -ir and add the following endings for the correct person: ...

Front - Outer -Inner -Last (FOIL)
x X x = x^2x X 7 = 7x 5 X x = 5x5 X 7 = 35
7x + 5x = 12x
x^2 + 12x + 35

A large surface area for gaseous exchangea waxy cuticle prevents water lossthe spongy mesophyll layer has air spaces which allow for efficient gasious exchange Stomata allow gases to enter and exit the le...