The value of the constant k when the value of x and y is 7 and 3 respectively in the equation xy=k is 21.
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The value of the constant k when the value of x and y is 7 and 3 respectively in the equation xy=k can be written as,
[tex]xy=k\\\\(7) \times (3 ) =k\\\\k= 21[/tex]
Hence, the value of the constant k when the value of x and y is 7 and 3 respectively in the equation xy=k is 21.
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