Question 1 Triangle JKL congruent to Triangle MNP, KL - 21x - 2. NP - 20x, U - 15x, PM - 13x + 4, and MN - 2x + 7. Find KJ.
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Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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