MATH!!!

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Across
  1. 3. Parts of an expression or series separated by + or – signs,
  2. 6. A relation for which each element of the domain corresponds to exactly one element of the range
  3. 7. A polynomial with one term
  4. 8. A point at which a graph intersects the y-axis.
  5. 11. The total amount of space enclosed in a solid
Down
  1. 1. power of a number
  2. 2. A box shape on a plane. Formally, a rectangle is a quadrilateral with four congruent angles (all 90°).
  3. 4. The sum or difference of terms which have variables raised to positive integer powers and which have coefficients that may be real or complex
  4. 5. The result of dividing one number or expression by another
  5. 9. number that can be written as a fraction
  6. 10. The ratio of the circumference of a circle to its diameter