Can someone help me with log equations?

Question

I have to finish a packet for school before the end of the summer. I have forgotten a lot of things in the packet. Can you help me with these problems?

(I created an image in paint)

http://i37.tinypic.com/2cmsowp.jpg

PLEASE HELP!!!

Answer 1

Instead of dealing with the questions directly I will tell you want you need to use to solve them.

1) if a^b = c then log(base a)c = b

2) log(base a)b - log(base a)c = log(base a)b/c

3) same as 2 but you also must realise that if both sides are logarithmic functions to the same base then the things being logged must be equal i.e.

if log(base a)(x - 6) = log(base a)(76)

then x - 6 = 76

If you use all these you hould be able to do those questions. ps check out this website for more logarithm laws and help on maths at A level standard: http://www.mathcentre.ac.uk/resources/le...