Question: 7. The point (a, 8) lies on the circle defined by x + y = 100. a) Explain why there are two possible values

7. The point (a, 8) lies on the circle defined by x + y = 100. a) Explain why there are two possible values for a. Find these values. b) Use a graph to check that the points corresponding to both values for a are on the circle.

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