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Both words are correct and have the same meaning. However, it is more common to use "imprimido" (regular form) in the present perfect tense: "Yo he imprimido los documentos" (I have pr...

Advantage: It is a quick and easy way of choosing participants for a study as it is based on convenience. Disadvantage: It may not be representative of the target population, potentially producing a sampl...

Take the example: 'The price of a TV is reduced to 69% and is now £379.50. Find the original price. (This means find the price when it was at 100%.) Let's start by calling each percentage a 'part'. The ne...

Take the example f(x)=(2x^2+1)/(3x+5) , where we're finding the gradient at x=0. First, you need to differentiate f(x) to get f'(x). Because f(x) is a fraction where both the numerator and denominator are...

Firstly you have to find the turning points of the graph. This is done by differentiating the equation of the line. Once you have found this first derivative, equate the equation to zero. Now solve the eq...