Answer:
[tex]=3\frac{1}{4} + 2\frac{2}{3}+5\frac{3}{4}\\\\[/tex]
=[tex]\frac{13}{4} + \frac{8}{3} + \frac{23}{4}[/tex]
[tex]=\frac{(13*3)+(8*4)+(23*3)}{12} \\\\=\frac{39 + 32 + 69}{12} \\\\=\frac{140}{12}\\\\=\frac{35}{3}\\\\ = 11\frac{2}{3}lbs[/tex]
