how do you work this problem?A=1/2bh?
375022
That's the formula for the area of a triangle.  A = area, b = length of the base, h = height.  So let's say you have a triangle that's 12 cm long at it's base, and 5 cm high, then you just plug those numbers in, and get\n\nA = 1/2 * 12 * 5 = 30 (which is measured in square cm)
85841
How about this? Straight multiplying gives you the following:\n\n18b^3/b^2\n\nb^3 = bxbxb\nb^2 = bxb\n\nYou have 3 bs on top and 2 on bottom. Whenever you have the same number on top and bottom, it cancels out. Since there are 2 bs on bottom, 2 of the ones on the top cancel out as well. This leaves you with 18b.\n\nDid that help at all?
732898
ab=a+b\nab-a-b+1=1\n(a-1)(b-1)=1\na=(1/(b-1))+1\nIf a is not 1 and b is not 1, then you can find a if you know b and vice versa. Therefore, if a is anything other than 1, you can find b that works and vice versa.
629765
You are right it is 1/2bh
1075528
(7.3-.5-2.5)/-.9 = b\n\nb = -4.8
917052
16/24....it's really not that hard...you should be able to solve it on your own.\nps. you might want to simplify it down to 2/3.
390719
so you have (1/2)a+a-(6/3)=4+(1/3)a\n\nadding like terms: (3/2)a-2=4+(1/3)a\n\nsubtract (1/3)a from (3/2)a and add two to both sides:\n(3/2-1/3)a=4+2\n(9/6-2/6)a=6\n(7/6)a=6\n\nnow solve and what do you get? :)
1142473
The volume of a cylinder equals the (area of the base)*height = π r2h
1054627
assuming this is (3a+1)/(a^2-1) - 1/(a+1)\n\nfactorise the (a^2-1) to give (a+1)(a-1)\n\nmultiply the second fraction by (a-1)\n\n-->  (3a+1)/[(a+1)(a-1)] - 1(a-1)/[(a+1)(a-1)]\n\nfactorising this gives [(3a+1)-(a-1)]/[(a+1)(a-1)]\n\nwhich equals (2a+2)/[(a+1)(a-1)]\n\n= [2(a+1)]/[(a+1)(a-1)] \n\nthe (a+1)'s cancel out...\n\ntherefore = 2/(a-1)
240687
4m+H-(4m-h) =\n4m+H-4m+h=\n4m-4m+H+h=\n0+H+h=\nH+h
777394
factor out 4b\n\n4b(b-2)= 0\n\nb = 2, 0\n\ngoodluck ^_^
1145188
7.125\n\nA = .5(B)(H)
300657
let a = b  \nMultiply both sides by a \na² = ab  \n Add (a² - 2ab) to both sides \na² + a² - 2ab = ab + a² - 2ab  \n Factor the left, and collect like terms on the right \n2(a² - ab) = a² - ab  \n Divide both sides by (a² - ab)\n2 = 1\n(The place where the proof goes wrong is the very last step.  If a² - ab = 0, then you would be dividing by zero, which is undefined.)
685042
A=2LW+2LH+2WH\n\nA-2LW=2LW-2LW+2LH+2WH\n\nA-2LW=2LH/2L+2WH\n\nA-2LW\n------------ = 2WH\n    2L\n\nA-2LW ~~~(1)  ~~~~~~(1)\n------------  -------- = 2WH   --------\n    2L~~~~~ (2W) ~~~~~(2W)\n\nA - 2LW\n------------- = H\n    2L(2W)
868541
the truth about this is find the right formula for this equasion, then set it with ur need of what space you put it in to example : =sum(a1:a28)
395828
haha, but this does not work. you cannot mathematically divide by (a-b) because this quantity is equal to 0. (1-1)=0. Dividing by zero yields an indeterminate answer.
775644
Duch, there's some confusion over what the problem is.  It could be a/(3+4b) - a/(3+b)  OR  a/3 +4b -a/3 -b\n\nIf the former, then it boils down to -(11ab)/(9 + 15b + 4b²)\n\nIf the later, 3b