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How to solve a quadratic equation.

Group the like terms together to make the equation less messy leaving the equation equal to 0.Simplify the long quadratic equation into brackets.Each bracket must be equal to 0 to fulfil the equation.When a ...
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Answered by Imikan B. • Maths tutor
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A sample of strontium has a relative atomic mass of 87.7 and consists of three isotopes, 86Sr, 87Sr and 88Sr. In this sample, the ratio of abundances of the isotopes 86Sr: 87Sr is 1:1. Calculate the percentage abundance of the 88Sr isotope in this sample

Q. A sample of strontium has a relative atomic mass of 87.7 and consists of three isotopes, 86 Sr, 87 Sr and 88 Sr. In this sample, the ratio of abundances of the isotopes 86 Sr: 87 Sr is 1:1. Calculate the ...
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y = (x + 2)(x + 5)

steps as follows:x times x = x 2 2 times 5 = 102 times x = 2xx times 5 = 5xthen add these together:y = x 2 + 7x +10x = -2, -5; y = 0, 10
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Answered by Georgie L. • Maths tutor
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Identify some features from Debussy's Claire de Lune that are associated with the Romantic era.

Use of dissonant and crushed harmonies.Varied rhythm and rubato.No clear melody line.
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Answered by Georgie L. • Music tutor
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Explain the differences between enzyme inhibitors

There are two types of inhibitors. Competitive inhibitors have a similar tertiary structure to the substrate and so can bind temporarily to the enzyme’s active site. This blocks the active site meaning the s...
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Answered by Laura N. • Biology tutor
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