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There are ten points in a plane, five of which are collinear. No other set of three of these points is collinear. How many triangles can be formed using the ten points as vertices.

i got these questions for hw and kinda stuck how to do them..I know the three equations for t for sin cos and tan but im a bit stuck how to use them..solutions would be much appreciated!

Can someone explain to me the difference between style and structure and relevant techniques use to back up each (particularly structure) in a poem?

The sum of the first n terms of a sequence is given by Sn = 3^n - 1. Find the general term, hence the first four terms. answer is 2{3^(n-1)} i cant seem to subtract exponentials properly and therefore cannot obtain the general term. Any help would me much appreciated!

Q: Calculate the mass of one atom of zinc. I am first calculating the number of moles in zinc >>> # of atoms = # mols / (6.02 x 10^23) then i am subbing the number of moles into the equation number of moles = mass of substance over Molar mass 6.02x10^23 = m/M m = 3.94x10^25 but answer says...

A Railway truck of mass 2.0 x 10^3 kg moving at 4.5m/s passed under a coal hopper where a load of coal was dumped into it. This caused a reduction of speed to 0.75m/s. What was the mass of the load?

I have these questions which im stumped on..help would be appreciated. Just 9d) and 10a) and b) edit: worked out the answers myself

Hi guys I have this essay question to do on wednesday and our teacher has kinda hinted that this is the question. Basically what we have to do is answer the question: what can we learn about New Kingdom Egypt from the contents of Tutankhamens tomb? we will be given some sources and use them to...

Someone help me with these questions please..really stumping me..thanks! 1. The first ten letters of the alphaet are to be placed in a line, find the number of arrangements possible if: a) the A and B are together and the C, D and F are not. b) The A and B are together, the C and D are...

Explain why ores are non renewable resources Explain why ores are non renewable resources. is this because an ore in essence is a mineral thats profitable to extract and even though the earth is plentiful in minerals, they will eventually run out and cannot be produced as fast as they are...

I have this question to answer: Explain why we produce and use alloys rather than just pure metals. is it just because we can make substances harder and make them more suited to our needs like iron becoming steel that is used in infastructures? Or is there more to it?

Hi i have these questions to do and im kinda lost..help would be much appreciated. For the last question, i only need the solution for the proving part, the rest i did. Thanks

Does anyone have any chemical earth exam papers preferably with answers? On the resources page there is hardly any preliminary chem stuff and yeah..anyone got anything, itd be much appreciated!

Any ideas? apart from trying to obtain oxygen and hydrogen? maybe something to do with industrial use?

Hi i was just looking at some homework i got and kind of a bit stuck. Help would be appreciated with these questions 1) Identify types of communication data that are stored and transmitted in digital form 2) Discuss the developments in technology that allowed the production of...

I got these annoying questions for hw over the weekend from my teacher :( I attempted them but i am a bit lost. Help would be much appreciated. Cheers

I got some really annoying logarithm questions that ive struggled with. Help would be just awesome! 1) Use logarithm laws to simplify - 2) Use logarithm laws to simplify + 5 =