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If (2x+3)/(x-4)-(2x-8)/(2x+1)=1, what is x?

First eliminate fractions; Multiplying both sides by (x-4) gives; (2x+3)-((2x-8)(x-4))/(2x+1)=(x-4) Multiplying both sides by (2x+1) gives; (2x+3)(2x+1)-(2x-8)(x-4)=(x-4)(2x+1) Now simplify the expression; E...
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Answered by Hannah C. • Maths tutor
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Explain the characteristics of enzymes and the lock and key theory of enzyme action. Explain the role of enzymes in catabolic and anabolic reactions.

1) enzymes are biological catalysts that will speed up reactions by reducing activation energy for the reaction. 2) Lock and key theory concerns how the enzyme (lock) only forms a reactive complex with a spe...
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Answered by James B. • Biology tutor
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Solve this quadractic equation: x^2 - 8x + 15 = 0

To solve x 2 - 8x + 15 = 0 we could try to use the Product, Sum, Numbers method (PSN). The PSN method tells us that our numbers must multply to make the product of the first and last term, in this case 15. I...
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Answered by Toby S. • Maths tutor
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Lisa, Max and Punita share £240 in the ratio 3 : 4 : 8 How much more money than Lisa does Punita get?

We should put the names aside to begin with and just look at the ratio and the price. In order to find out how much the ratio 3, the ratio 4 and the ratio 8 are worth, we need to find out how much the ratio ...
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Answered by Freddie R. • Maths tutor
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What is crude oil and how is petrol derived from it?

Crude oil is a mixture of hydrocarbons. The crude oil is evaporatedand its vapours condense at different temperatures in the fractionating column. As you go up the fractionating column, the hydrocarbons have...
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Answered by Tahir P. • Science tutor
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