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A curve has equation 2(x^2)+3x+10. What is the gradient of the curve at x=3

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Answered by Tom E. • Maths tutor
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In an economy consumption=50, investment=60, government spending=160, imports=60 and exports=40. What is the aggregate demand of the economy

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Answered by Tom E. • Economics tutor
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A curve has equations: x=2sin(t) and y=1-cos(2t). Find dy/dx at the point where t=pi/6

Since this question concerns parametric's, one may move to eliminate t from the equation to calculate dy/dx directly. However, in this case it is much easier to use the chain rule and realise that dy/dx=dy/d...
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Answered by Cameron H. • Maths tutor
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Polyester is a common polymer used in clothing. State the name of the chemical reaction used to form polyester by reaction of ethanedioic acid and ethane-1,2-diol. Give the name of the molecule which is lost upon condensation of these two molecules.

Name of reaction is condensation polymerisation.Water is lost upon condensation of ethanedioic acid and ethane-1,2-diol (will draw this out on the whiteboard).
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Answered by Melissa W. • Chemistry tutor
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Vous décrivez là où vous habitez pour votre blog. Décrivez ...

In order to gain 10 out of 10 for the "content" side of this question, there are certain things a student must do. I would say the easiest way to gain a marker's confidence is responding to all fou...
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Answered by Saoirse G. • French tutor
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