Guidance please?

1. If s = ut +1/2 at to te power of 2 express a in terms of the other


variables





2. Given 1/a = 1/b + 1/c express b in terms of the other variables.

Guidance please?
1. s = ut + (1/2)at^2


transpose ut to the other side


(1/2)at^2 = s - ut


multiply both sides by 2


at^2 = 2(s - ut)


divide both sides by t^2


a = 2(s - ut)/t^2 Answer





2. 1/a = 1/b + 1/c


transpose 1/c to the other side


1/a - 1/c = 1/b


multiply both sides by abc


bc - ab = ac


factor out b


b(c - a) = ac


divide both sides by (c - a)


b = ac/(c - a) Answer