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Express '2x^2 + 8x + 30' in the form 'a(x+b)^2 + c'

b = B/2A = 8/(2x2) =8/4 = 2 c = C-((B^2)/4A) = 30-((8^2)/(4x2)) = 30-64/8 = 30-8 = 22 => 2x^2 + 8x + 30 = 2(x+2)^2 + 22
CC
Answered by Charles C. • Maths tutor
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Assess how important purges were in allowing Stalin to retain control of Russia 1930-1940?

The command word in this question is 'assess'. That means they want you to compare the purges with other developments occurring throughout the period and reach a final judgement : for example, arguing the pu...
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Answered by Lachlann H. • History tutor
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Effect of non-competitive inhibitor (on enzyme activity) on enzyme catalysed reaction

Binds on to enzyme at a site that is not the active sitechanges the tertiary structure of the active sitesubstrate cannot bindinhibits enzyme activity
KC
Answered by Kelvin C. • Biology tutor
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Effect of competitive inhibitor (on enzyme activity) on enzyme catalysed reaction

similar in shape to {substrate}fits onto active siteprevents substrate bindinginhibits enzyme activity
KC
Answered by Kelvin C. • Biology tutor
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Effect of enzyme concentration in excess substrate on enzyme catalysed reaction

directly proportional: increase in [enzyme] will increase rate of reaction
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Answered by Kelvin C. • Biology tutor
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