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The perfect tense in French is used to describe completed events in the past, i.e. actions that are completely finished. For example, if you wanted to say, 'she played football yesterday', you would use t...
An isotope is an derivative of an element that differs from its original type in the number of neutrons it has. N(17) has 7 electrons, 7 protons and 10 neutrons.
'I live in a city' would translate to 'J'habite dans une ville.''My favourite subjects are Spanish and Maths' would translate to "Mes matières preferées sont l'espagnol et les m...
Photosynthesis is the process plants undergo to make energy. Carbon dioxide + water > oxygen and glucose. Plants need sunlight for this process to occur. The roots of the plant take water from the soil...
First notice I is the 2x2 identity matrix (1,0;0,1) now we can form an equation to solve for a, look for an entry where a is involved the (1,2) entry of I is 0 and calculated by 1(-1)+2a=0 now solving giv...
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