Math really miss her, huh?

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