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Explain the use of Imperfekt and Perfekt, and give one example each.

The German tense of Imperfekt is used when describing situations that occured in the and which have no influence on the present. It is also used when talking about states and feelings in the past. Additional...
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Answered by Jeanette S. • German tutor
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How do you solve simultaneous equations?

Simultaneous equations have two unknowns, you need to find out one of the unkowns (eg. x) in terms of the other (e.g. y) in order to solve both unknowns. Using these two examples (x and y) we can construct a...
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Answered by Charlie O. • Maths tutor
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Solve 3(3x - 2) = 5x + 10

9x - 6 = 5x + 10 9x - 6 - 5x = 5x + 10 - 5x 4x - 6 = 10 4x - 6 + 6 = 10 + 6 4x = 16 x = 16/4 = 4
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Answered by Suraj P. • Maths tutor
5095 Views

How can we calculate the sinus of 120°?

We can observe that120° represents the sum of two common angles: 30° and 90°. So we can rewrite sin(120°) as sin(30°+90°). Now we are going to use this trigonometric formula in order to calculate the sinuns:...
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Answered by Monica M. • Maths tutor
8844 Views

How do I expand a factorised expression?

Take example (x+3)(x-4) We use FOIL - first, outer, inner, last We multiply each part by the other part. First -> x times x = x 2 . Outer -> x times -4 = -4x (remember the minus infront of the 4), Inne...
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Answered by Sarah K. • Maths tutor
3959 Views