Question

Which conjunction or disjunction is equivalent to the open sentence |a – 9| ≤ 4.









A.

a – 9 ≥ 4 and a – 9 ≤ –4








B.

a – 9 ≤ 4 or a – 9 ≥ –4








C.

a – 9 ≤ 4 and a – 9 ≤ –4








D.

a – 9 ≤ 4 and a – 9 ≥ –4

Answer 1

\[|a-9|\leq 4\\
-4\leq a-9\leq 4\]

Answer 2

which his in fact D, not B

Answer 3

it is an "and" statement, not an "or" statement