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Solve x^2 - 7x + 10 = 0

First factorise: (x - 2)(x - 5) = 0 Then either: x - 2 = 0 so x = 2 or x - 5 = 0 so x = 5
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Answered by Aran D. • Maths tutor
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How can I revise for an English exam?

Many people allow English to fall to the bottom of their priority list when revising for exams. Unlike other academic subjects, English is not a sequence of learning facts for a simple question and answer.Bu...
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Answered by Alexandra P. • English tutor
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Rearranging equations

Quesiton: Solve 10x - 7 = 5x + 3, to find the value of x Answer: x = 0.5 Solution: First you must rearrange the equation so that all the like terms are on the same side: 10x - 5x = 3 +7 5x = 10 Then to find ...
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Answered by Hamid S. • Maths tutor
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A sound wave has a frequency of 500 Hz. The sound wave has a wavelength of 0.34 m in air. Calculate the speed of the sound wave in air?

As we know so far, c = f / λ. This equation comes from a much simpler version of speed = distance/ time. As the λ (with units "m") can be seen as distance and the frequency (with units "1/s&qu...
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Answered by Reni A. • Physics tutor
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Solve 5x - 7 = 3x + 2, to find the value of x

x = 4.5 Rearrange the equation, so that like terms are on the same side: 5x - 3x = 2 +7 2x = 9 Then to find x, divide 9 by 2 x = 4.5
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Answered by Suzy A. • Maths tutor
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