Posted by **Help now please ** on Friday, August 30, 2013 at 2:19pm.

Find the value of x. Round u'r answer to the nearest hundredth, if necessary.

Area of triangle=108m^2

A=1/2 bh

b=(x+6)m

h=xm

So, 108m^2=1/2 ((x+6)m)(xm)

108m^2=1/2 m^2+x^2+6????

If so then what? Sub m^2 from the left side?? Then what? :/

- Geometry/Algebra 1/12th grade -
**Steve**, Friday, August 30, 2013 at 3:13pm
I think the m means meters, as in unit of length: 6m

108 = 1/2 (x+6)(x)

x^2+6x-216 = 0

(x-18)(x+12) = 0

since we want a positive side, x=18m

If you really want to carry the m's along, just do so:

108m^2 = 1/2 (x+6)m*xm

= 1/2 x(x+6)m^2

Now the m^2's cancel out, and we proceed as at first.

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