Rachel S.

asked • 04/14/16

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 

1 Expert Answer


Kenneth S. answered • 04/14/16

4.8 (62)

Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018

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?


Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.


Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.