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La vida sana: cambian las opiniones.La semana pasada nos decían que debíamos consumir dos litros de agua al día. Ahora resulta que sólo hay que hacerlo si tienes sed. ¡Cómo cambian los co...

Remember that the equation of a straight line function is: ax+c. a= change of y/ change of x
The steps to follow are:1- find the gradient of the slope2- replace the equation by values coming from any...

We start by noticing that both the numerator and denominator are expressions which can be factorised into brackets. Starting with the numerator, we multiply the coefficient of x^2 and the constant term to...

Bacteria resides virtually everywhere around (and within) us. In schools and university conditions, bacteria cultures are incubated at 25°C or lower to reduce the chances of growing harmful pathogens whic...

Write the 2 equations above each other: 3x-y=23 2x+3y=8First we want to remove the y terms to be able to find out x, so multiply the top equation by 3 9x-3y=69 2x+3y=8Now that we have -3y on the top and -...