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Because by looking at the second derivative of a function you are essentially looking at the rate of change of the rate of change. This carries useful information about a function's behaviour and in some sen...

Step 1: Start off by labeling the 2 equations. 3 x + y = 7 will be equation 1. 3 x - y = 5 will be equation 2. Step 2: rearrange equation 1 to make y the subject. 3 x + y = 7 ---> y = 7 - 3 x (here 3 x is...

On average neurones in the body have a resting membrane potential (RMP) of -70mv. What this means is when inactive/ not excited, the inside of neurone is more negative than the outside of the neurone this is...

A 2x2 square matrix is of the format (a b;c d). First you must check whether the matrix is invertible at all: if a d - b c is 0, the matrix is not invertible. The inverse matrix is (1/(ad-bc))*(d -b;-c a)

Improving your foreign language speaking abilities can only come through practicing speaking. While of course listening to the foreign language will help, by giving you an idea of typical sentence constructi...