Answer: [tex]11\ \text{pounds}\ 6\ \text{ounces}[/tex]
Step-by-step explanation:
Given
Issac and Isaiah born weighing 6 pounds 2 ounces and 5 pounds and 4 ounces.
1 Pound is equivalent to 16 ounces
Issac weighs
[tex]\Rightarrow 6+\dfrac{2}{16}\ \text{Pounds}[/tex]
Isaiah weighs
[tex]\Rightarrow 5+\dfrac{4}{16}\ \text{Pounds}[/tex]
Their combined weight is
[tex]\Rightarrow 6+5+\dfrac{2}{16}+\dfrac{4}{16}\\\\\Rightarrow 11+\dfrac{6}{16}\ or\\\\\Rightarrow 11\ \text{pounds}\ 6\ \text{ounces}[/tex]