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
I got A, is that right?

Answer 1

|a - 9| ≤ 4 is equivalent to -4 ≤ a - 9 ≤ 4 is equivalent to a - 9 ≤ 4 and a - 9 ≥ 4

Answer 2

Knowing this, which answer choice would be correct?

Answer 3

D..?

Answer 4

Yes, correct.

Answer 5

Thank you so much! :D

Answer 6

yw