Question

13. Nine less than a number is no more than 8 and is no less than 3.

Answer 1

`&#x \in [12, 17]`

Explanation:

`3 \leq x-9 \leq 8 \\ \\&#3 \leq x-9 \\
3+9 \leq x \\&#12 \leq x`

`&#x-9 \leq 8 \\&#x \leq 8+9 \\&#x \leq 17 \\&#12 \leq x \leq 17`

`&#x \in [12, 17]`

Answer 2

Explanation:

I think we can choose the number 5 so

9 - 5 = 4 no more than 8 and less than 3