exam Maths Puzzle Numerical Ability

A rope was cut into two pieces so that one piece was 18 m longer than the other. That piece was also three times as long as the other. How long was each piece and how long was th

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can someone please help me with this problem:

Complete the square and write the equation in standard form. Then give the center and radius of the circle.

x^2^+ y^2 - 2x - 4y - 4 = 0 solve each system by substitution

y=x+3
y=2x+4