Math really miss her, huh?

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Across
  1. 2. Vertex Form
  2. 3. General equation of combined equation
  3. 7. Third equaion of joint variation
  4. 11. Second equation of joint variation
  5. 14. The middle of a parabola
  6. 15. Standard form of quadratic functions
  7. 17. Inverse Equation
  8. 18. The middle of the parabola
  9. 19. The third equation in direct and inverse. Which we need to find the
  10. 20. Quotient of constant two variables(x,y) is a constant
  11. 22. Third step in solving quadratics inequalities
Down
  1. 1. Constant variation of inverse variation
  2. 4. Formula for finding constant in direct variation
  3. 5. A quantity varies jointly as two or more varbles.
  4. 6. The middle of the parabola which we cut on half
  5. 8. Mathematical statement to inequalities
  6. 9. General equation of joint variation
  7. 10. The variations relating the quantities
  8. 12. Equation of direct variation
  9. 13. Constant of joint variation
  10. 16. A term found in almost of the variations
  11. 21. A variation that one quantity increases and the other decreases