exam Maths Puzzle Numerical Ability

A line segement through the center of each circle intersects the circle at the points shown.

A. find the coordinate of the circle's center.
B. Find the radius of the circle.

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exam Other Question

Solve each system by graphing. y=-2/3x
2x+3y=5
I tried to use the formula y=mx+b. Can you show me line by line instructions so I can get the steps straight in my head. Thanks for your help. A bag of potatoes weighing 5 pounds and 12 ounces costs $2.07. What is the cost of 1 pound of potatoes?