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Find an equation for the straight line AB , giving your answer in the form px+qy=r, where p, q and r are integers. Given that A has co-ordinates (-2,4) and B has co-ordinates (8,-6)

We know 2 equations for a straight line; Y=MX+C and Y-B=M(X-A) . Since we do not have the y intercept (C) or any means of finding it but we do have 2 points on the straight line, it would make sense to use t...
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Answered by Samantha C. • Maths tutor
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Find the equation of the straight line passing trough the points (-2,1 ) and (1, 4).

Firstly you need to understand the question. It asks for the equation of a straight line, which is linear, thus of the form y = mx+c. Now, knowing that the equation is of that form we firstly need to find th...
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Answered by Alin G. • Maths tutor
3074 Views

how do you know when to use a direct or an indirect object pronoun?

Direct object pronouns: me, te, le, la, nous, vous, les me, you, him, her, us, you (pl), themIndirect object pronouns: me, te, lui, nous, vous, leur to me, to you, to him/her, to us, to you (pl), to themObje...
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Answered by Lauren S. • French tutor
2083 Views

A batch of Titanium(iv) Chloride is electrolysed in a chemical plant. (a) State the type of bonding in Titanium(iv) Chloride and why it has to be molten in order to undergo electrolysis. (b) Explain why a DC current has to be be used for electrolysis.

(a) Ionic bonding. Ions are free to move/flow(b) So only one product is produced at each electrode OR So that the cathode/anode stays negative/positive which allows only the positive/negative ions to reach t...
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Answered by Azhar S. • Chemistry tutor
2600 Views

Explain the trend in boiling points for the group 6 hydrides (O,S,Se,Te). Diagram would be included.

There are 2 factors that affect this problem. (1) The hydrogen bonding ability of H 2 O which increases the boiling point.The partial charges, induced by the higher electronegativity of oxygen, mean that the...
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Answered by Jack R. • Chemistry tutor
35610 Views