Mr M's Edexcel GCSE Linear 1380 Higher Tier Paper 3 Answers June 2011

maybe you only do it if the number is odd then? because yeah that seems wierd...

hi, im using mathswatch to revise for the calculator paper tommorow, do you have any reccomendations on which clips i should watch.

Thanks

Correct region indicated by shading or
clearly labelled. Boundaries of the region may
be solid or dashed.
that was from a mark scheme......(talking about the inqualities being dotted or dashed)

everyone i did n/2
the sample size was 62, so 62/2=31
so, median class is frequency 31

If you did a column showing CF: you'd see that 31 lies in 21 to 25.

So median= 21+ (31-7)/19 *4

hi just wanted to check something. if a question asks for you to complete the square, and it was an equation like x^2 + 8x, you can only go up to (x+4)^2 - 16, right? you can't actually solve it (as in have two values for x)?
the only questions you can solve with completing the square is when its a quadratic equation (ending in = 0)
is that correct? thanks.

Yes that is an expression, hence you can't solve it.

your confusing me now

x>1=dotted
x<1=dotted
X=1=solid line

no, what you are wokring out is the mean. sigma fx / sigma f...... that's the mean

Oh yeah sorry I thought he was asking the mean :P, as median is so easy lol.

has anyone started revising for add maths?... im still on a C, well peeed off though because i messed up a simultaneous equation which would have give me a B

yo Mr M, was wondering about two things;

1.) For the transformation question i wrote vector of (6 1)....will i get one mark for that?

2.) For the questionnaire, i said the sample size might be too small? will that get the mark.

Thanks