menofstudy said:
Thank you Mr.Kind! Where did you go on BOS to find that? I am going to do other past papers so where can I go in the future for the working out and answers?
Nowhere. All my own work. All care and no responsibility, etc, etc.
menofstudy said:
In question 23 b i & ii my answers were
i.) x = F + 115
ii.) (415/2) - 115 = x
207.5 - 115 = x
92.5 = x
Do you know if that would get marked right or not?
In (i), I don't think it's wrong. Novirus costs $115 more than Funmaths, and your equation says that. Usually the question says write an expression for the cost of Funmaths (F) in terms of the cost of Novirus (x). That really does mean that the subject of the equation must be F and x needs to be in the RHS.
However, strictly speaking, in an equation, there is an expression on the LHS and an expression on the RHS. So the only expression you have with x in it is just x, and that expression does not equate to the cost of Funmaths.
Who knows how they marked it!
In (ii) you've made something up. In (i), your rule says x = F + 115, but then you've used something different in (ii). The key in the question says that the two things together cost $415, so write that down.
x + F = 415
Then use your rule, x = F + 115, so:
F + 115 + F = 415
2F + 115 = 415
2F = 300
F = 150
Hope that helps.
before you sent this I did find your thread with the answers and marked my paper from those. I found some mistakes, which might not even be mistakes, and I posted them in the thread. I don't know where that thread is now though :S