Answer:
please write complete question
Step-by-step explanation:
Given equation of circle is,

again the another form of circle is,

now equating the values of f in both equations,
-k=-3
i.e. k=3
therefore k=3
Number 21 would be 6 39/40
Answer:
sale price
Step-by-step explanation:
price of an item that is being offered at a lower price than usual
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