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First divide 15 by 3 to find xx= 15/3 = 5Now use x to find yx +y = 7 substitue x. 5+y=7y= 7-5= 2Now you know x=5 and y=2 use this to calculate the answer, remembering to do the sum within the brackets fir...

dy/dx = 9x⁸ + 6x - x^-2

Add a solution containing Barium ions (eg BaCl2, Ba(OH)2, etc)K2SO4 will form white precipitateKNO3 will have no visible change

A) The aldehyde contains a planar carbon group which can be attacked from both sides. Each side has equal probability of being attacked resulting in a ra...

This is a standard A Level essay question which is asked across multiple exam boards with an ultimate theme that the student must write about. It is also a good question to work through with students as ...