Question

Help -s/2 ≥ 9

Answer 1

\[\frac{ -s }{ 2 } \ge 9\]
Multiply both sides by -2
and when you multiply in an inequality by a negative, you need to reverse the sign
So \[s \le -18\]

You can check this out by plugging in a number that satisfies the answer, like -20.

-(-20)/2 = 10, which is larger than 9, so it works.

If you plug in -18, you get -(-18)/2 = 9 which also works.

Answer 2

Thank You