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b)

"J’éteins toujours la lumière quand je quitte une pièce" translates to "I always turn off the light when I leave a room" so the most likely subject is b) energy saving

first of all the equation needs to be written in the form (ax+b)(x+c) 

because 2 can only be made by multiplying 2 and 1 we know that a=2 so (2x+b)(x+c)

-6 can be made by multiplying 2 and -...

If P is directly proportional to Q then that means if Q increases P will also increase. If Q decreases P will also decrease. Two values that are directly proportional to each other are related to each oth...

Genotype is the genetic composition for a particular phenotype. It involves both alleles from both the father and mother. So a genotype of the colour of eyes (blue) could be bb or BB or Bb. 

This is a sequence in the form 1 + c + c² + … cⁿ

1 + c + c² + … cⁿ  * (1 - c) = 1 – cⁿ⁺¹

So we can rewrite the sequence as

1 – c...