exam Maths Puzzle Numerical Ability

How do you graph to graph (x+2)^2+(y+2)^2=9

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exam Other Question

the equationof a line with slope m that passes through the point (c,d) is given the formula y-d=m(x-c).
if m=4 and (c,d)=(6,0) which of the followingis an equationof the line A chemist mixed a 20% acid solution with a 60% acid solution to make 10 L of a 30% solution. How many liters of the 60% solution were used?