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Maths Puzzle
Numerical Ability
find center and radius of this circle
x^2+y^2+6x-4y+5=0
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book Other Question
I need help with understanding the word twice in these problem. Thank you.
two more than twice a number
three less than twice a number
n-2.5>15
n-2.5+2.5>15+____
n>_____