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The perfect tense is used for completed actions in the past, for example, 'I played'- 'j'ai joué'To form the perfect tense, we need a subject (a noun, name, or pronoun - je, tu,...
The term 'checks and balances' defines the ability of different branches of government to stop each other from acting; it is designed to prevent one branch from gaining an inordinate amount of power. An e...
3x + 5y = 14 (times this entire equation by 3) --> 9x + 15y = 42 4x + 3y = 4 (times this entire equation by 5) --> 20x + 15y = 20Now both of the simultaneous equations have 15y, so you can subtract ...
Cracking is when large hydrocarbon molecules are broken down into smaller ones using a catalyst - one alkane and one alkene are formed.Alkanes are hydrocarbons with only single bonds.Alkenes have one doub...
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