A runner takes part in a 10-kilometer marathon. He reports at a checkpoint after running every -- kilometer. How many checkpoints does he report at, including the one at the start and the one at the end?

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

What is the absolute value of -100000000000000?

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