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One factor is that middle-class parents have more disposable income to spend on educational books and toys from a young age, meaning they can develop cognitive patterns more suited to educational success....

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So let's use 2x + 5y = 11 and 3x - 5y = 4 as our example.In these equations we have 2 unknown variables, x and y which we are trying to work out. The numbers in-front of the letters are the amount of time...

Longitudinal studies (sometimes called prospective studies) follow the same group of individuals over time, typically months or years. Longitudinal studies are employed to investigate a wide range of issu...

It's important that glucose levels in the blood are kept at a constant, as glucose is a key component for cell respiration. The mechanisms for glucose regulation involve the hormones insulin and glucagon....