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1047.1. Reverse proportionality concept.

Check the correct answer!

John lives 2km from school, every day it takes 10 minutes to school. In school he learned reverse proportionality concept, he used it when going home. Is every Johns statement correct?
If i move 2 times the distance away, my walking time would decrease 2 times.
Reverse proportionality
Reverse proportionality concept

Solve tasks to find hidden Geo point coordinates

  1. Physics: Ultrasound, Infrasound and sound usage.
  2. Algebra: Absolute and relative mistake of approximation
  3. Algebra: Albraic fraction.
  4. Algebra: Irrational numbers.
  5. Chemistry: Neutralisation reactions and calculations.
  6. Chemistry: Amount of substance.
  7. Physics: Archimedes law.
  8. Algebra: Fraction multiplication and division.
  9. Geometry: Triangle indrawn in circumference, location of encircled circumference centre.
  10. Chemistry: Substances with constant composition. Chemical formula.