Algebra

12345678
Across
  1. 2. when i sub -2 into x squared
  2. 4. the sum of two prime numbers less than ten
  3. 5. the HCF of 24 and 40
  4. 8. sunday the chance of school taking place on this day
Down
  1. 1. the sum of 4x-8x+7x
  2. 3. the number of possible 3 course meals 2S,4M,3desserts
  3. 6. this comes before multiplication
  4. 7. the same at 50%