Fix the constraint

Exercise and reference answers

Questions

1. Statement parts

   1. needs
   2. at
   3. least
   4. 10:
   5. 5x
   6. +
   7. y
   8. <=
   9. 10

   Correction

   >= — at least sets a floor, so the inequality points the other way

   Incorrect part

   <=

2. Statement parts

   1. Maximise
   2. f
   3. =
   4. 3000x
   5. +
   6. 2000y

   Correction

   Minimise — the gardener wants the lowest cost

   Incorrect part

   Maximise

3. Statement parts

   1. T
   2. =
   3. 37.86083836
   4. to
   5. 9
   6. sig
   7. figs

   Correction

   6.15311615 — that value is T squared, so take the root

   Incorrect part

   37.86083836

Instructions

One token in each line is wrong. Tap it, then read the correction.