Thanks in advance for the help!
\(The\;area\;of\;\bigtriangleup BDE\;is\;48\;cm^2.\;\\The\;point\;D\;divides\;\overset-{AB}\;so\;that\;\frac{\overset-{AD}}{\overset-{DB}}\;=\;\frac15,\;\\and\;point\;E\;divides\;\overset-{BC}\;so\;that\;\frac{\overset-{BE}}{\overset-{EC}}=\frac23.\;\\~\\The\;area\;of\;\bigtriangleup ABC,\;in\;cm^2,\;is\)
I have edited this to improve the presentation. Melody
+532 since ad/db is 1/5, then the ratio of the heights of the two triangles if you turned it so that line BEC is horizontal would be 5/(1+5) or 5/6, and the ratio of the bases is 2/(2+3) or 2/5. then, the ratio of the areas DEB/ABC = 5/6*2/5 or 1/3, so the area of triangle ABC is just 48*3 or 144.
