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The Answer is +5 or -5.
A lot of people make the common mistake of forgetting -5, since two negatives multiplied make a positive.

Area isosceles = hb/2 = hy/2Perimeter = 24x+3+x+3+x+2 = 243x + 8 = 243x = 16x = 16/3h^2 = (x+3)^2 - ((x+2)/2)^2h^2 = 56h = 2 root14area = 2root14*(x+2)/2area = 13.719 to 1dp

First begin with rearranging the second equation to put it in terms of Y. Then substitute by putting the second equation (y=3x+13) into equation one as Y^2. Expand (3x+13)^2 and add like terms to form 10x...

2 simultaneous unknown equations. Let x be the number of apples originally, and n the number of fruits in the bag in total originally. i) first scenario, where probability is 1/5, x/n = 1/5    5x= n  ii) ...

Begin by multiplying the second equation by three in order to get a 3y value: 9x + 3y = 33. We can now subtract equation one from equation two, 9x + 3y = 33 and 2x + 3y = 19 -->7x + 0y = 14. Resulting ...