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You have six cases in Russian: the nominative, accusative, genitive, instrumental, dative and prepositional. Remember they are all used at varying popularities, so the dative case is not nearly going to be u...

The subjunctive is a tricky part of the french language, one that often confuses students. There are several cases in which it is used: - when you express a desire, a will, an order (e.g. Je veux que tu...)....

If a set of equations has more unknowns than equations, you cannot get a value for each unknown. However, you can find the relationships between the variables.Start by rearranging one variable in terms of th...

To simplify a surd, remember that sqrt(a*b) = sqrt(a) sqrt(b) If either a or b are square numbers, you can simply write its square root. Hence, to simplify a surd, you must look for any factors of the number...

E.g you have 2 equations and have to set them equal to each other. 2x + 3y = 6 -3x + y = 2 multiply first equation by 3, second by 2 to get 6 x + 9y = 18 -6 x + 2y = 4 11 y = 22 y = 2 -6x + 2(2) = 4 -6x = 0 ...