Solve the open sentence.
–3 ≤ n + 6 ≤ 7
An ≤ 3 and n ≤ 7
Bn ≥ 9 and n ≤ 7
Cn ≥ –9 and n ≤ 1
Dn ≤ –9 and n ≤ 6
–3 ≤ n + 6 ≤ 7
An ≤ 3 and n ≤ 7
Bn ≥ 9 and n ≤ 7
Cn ≥ –9 and n ≤ 1
Dn ≤ –9 and n ≤ 6