Answer:
Step-by-step explanation:
If Ellen mixed [tex]\frac{1}{4}[/tex]kg of flour with [tex]\frac{2}{9} kg[/tex] of sugar together, the reasonable estimate for the amount of flour and sugar combined can be gotten by taking the sum of both masses of ingredients as shown;
Mass of flour = [tex]\frac{1}{4}kg\\[/tex]
MAss of sugar = [tex]\frac{2}{9} kg[/tex]
Combined masses = [tex]\frac{1}{4}+\frac{2}{9}[/tex]
[tex]= \frac{9+8}{36} \\= \frac{17}{36}kg[/tex]
The amount of flour and sugar combined is 17/36 kg