Answer
Find out the what fraction of the sandcastle did they build together .
To prove
Let us assume that the fraction of the sandcastle they build together be x .
As given
[tex]Beatrice\ built\ about\ \frac{1}{3}\ of\ a\ sandcastle.[/tex]
[tex]Linda\ built\ \frac{4}{7}\ of\ the\ same\ castle.[/tex]
Than the equation becomes
[tex]x = \frac{1}{3} +\frac{4}{7}[/tex]
L.C .M of (3,7) = 21
solving
[tex]x = \frac{7 + 3\times4}{21}[/tex]
[tex]x = \frac{19}{21}[/tex]
Therefore the fraction of the sandcastle did they build together be
[tex]x = \frac{19}{21}[/tex]
Hence proved
Answer:
19/21
Step-by-step explanation:
It should be easy explanation not so hard here
Step 1 we know it is add we find the LCM which is 21 3x7
Step 2 What u do to denominator do to the numerator 1/3x7 and 4/7x3
we get 12/21 and 7/21
Step 3 add them up! Then you get 19/21
How easy
