Rachel S.

# Value of variable given others in formulae

u=20, t=1.2, k=-5

D= ut + kr2

(a) Work out the value of D.

The answer I got for this is 16.8 which is most likely incorrect because I have never learnt how to answer this question so I used my knowledge of other things and tried it, I know for part b you have to rearrange formulae which i cant do so help is very appreciated.

(b) D = 50
t = 5
k = -5

-Work out the value of u (for the formula I wrote above part a)

Apologies I have written this in quite a confusing way

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Rachel S.

I couldn't tell whether the letter in the formula D = ut + kr was a 'r' or a 't' due to how it looks on my paper, I think when I worked out I presumed it was a t so i used substitution and got my answer, does this make sense?
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04/14/16

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