Maths year 11

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    (Original post by 34908seikj)
    Here

    Thank you will focus now )

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    (Original post by z_o_e)
    Thank you will focus now )

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    Just make sure with bearings, if you answer is only two numbers like say 50 degrees, you need to add a 0 at the front so it's three numbers - 050 degrees, for example.
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    (Original post by 34908seikj)
    It's essentially the opposite of compound interest; instead of increasing in value, it decreases.


    To calculate compound interest we do, for example 1000*1.1^2 - This will give us the value after 2 years at a rate of 10% compound interest


    Now for deprecation we would do 1000*0.9^2 - This will give us the value after 2 years at a rate of deprecation at 10%. (It goes down by 10% of the current value per year)

    Just remember with deprecation the decimal must be lower than 1.
    Hayaa
    Just did this question..
    The question was something like £800 depreciates by 30% in 2 years.

    So I did this

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    (Original post by z_o_e)
    Hayaa
    Just did this question..
    The question was something like £800 depreciates by 30% in 2 years.

    So I did this

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    Close, you got the percentage the wrong way around when you took it away.


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    (Original post by 34908seikj)
    Close, you got the percentage the wrong way around when you took it away.


    second question
    I feel Confident now!


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    (Original post by z_o_e)
    second question
    I feel Confident now!


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    Yup, you got it!
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    (Original post by 34908seikj)
    Yup, you got it!
    Yaaay now onto bearings

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    (Original post by 34908seikj)
    Yup, you got it!
    Bearing of a from B
    Is this 180-72

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    (Original post by z_o_e)
    Is this 180-72

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    What was the question?
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    (Original post by 34908seikj)
    What was the question?
    Bearing of A From b

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    You always go clockwise and if it's A to B, it will just be 072, or have you wrote the diagram out correctly?
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    (Original post by z_o_e)
    Bearing of A From b

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    (Original post by 34908seikj)


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    Yes, there's two ways of working it out, 360 - the co-interrior angle or the alternate angle + 180
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    (Original post by 34908seikj)
    Yes, there's two ways of working it out, 360 - the co-interrior angle or the alternate angle + 180
    So the answer is 252 degrees? Or 108? :/ I think it's 252

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    (Original post by z_o_e)
    So the answer is 252 degrees? Or 108? :/ I think it's 252

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    Yes, sorry it's 252 degrees
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    (Original post by 34908seikj)
    Yes, sorry it's 252 degrees
    Any hints on how to do the 3rd one?

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    (Original post by z_o_e)
    Any hints on how to do the 3rd one?

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    What's the question? A to B?

    Ah, its B to A obviously.

    think about Co-interior angles.
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    (Original post by 34908seikj)
    What's the question? A to B?

    Ah, its B to A obviously.

    think about Co-interior angles.
    Question is the same ... bearing of A FROM B

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    (Original post by 34908seikj)
    What's the question? A to B?

    Ah, its B to A obviously.

    think about Co-interior angles.
    Got something like this


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