And if I were the tax geek I would say do it yourself.Originally Posted by marc71178
I'm stumped.Originally Posted by aussie
Thanks. I am great!
It looks pretty simple to me actually.
Just looks like substitution. The last one was a bit trickier (the unknown one) but it just involved fidding around with the equation to change the subject.
Is this right? Cos I got totally different answers ... maybe I am on the wrong wavelength. It was hard to decipher what Aussie meant though. Too bad he's not here to clarify ...Originally Posted by Paid The Umpire
Yeah... I got -9 for the first one...Originally Posted by burkey_1988
My answers:Originally Posted by aussie
D: (1) -15
Maths experts, am I correct?
Woah, I have no idea what's going on.
D) 1. -15
3. X = (3+4y)/(2-y)
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Isn't D (2) X=-4 ... to be undefined to denominator has to be zero. Therefore, when X = -4 the denominator is zero
Yep - 75 in Macro and 100 in Micro (and 61 in French) - average of 78.25 and well on for a good firstOriginally Posted by twctopcat
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100 in micro, my mate got in the 90's and i thought he was good! Fair play!Originally Posted by Neil Pickup
No, the tax geeks actually enjoy it!Originally Posted by Craig
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I can confirm that Burkey is right on all counts.
Basically what it means is:
To calculate H given a set value of X, just do: (2x-3)/(x+4)
If X=-3, then H=(-9)/(1) = -9
If X=0.5, then H=(-2)/(-4.5) = -0.44 or -4/9
If X=5, then H=(7)/(9) = 0.78 or 7/9
For the next part, you need (2x-3)/(x+4) to equal three.
Multiplying both sides by (x+4) gives you (2x-3) = 3(x+4)
Expansion gives 2x-3 = 3x+12
Collecting like terms gives you x=-15
The last part is the easiest. For a fraction to be undefined, the bottom (denominator) has to be zero. So... (x+4) = 0 - and x = -4
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