Which notation uses only inequality symbols

Zack notices that segment nm and segment pq are congruent in the image below: which step could him determine if δnmo ≅δpqr by sas? (5 points) segment mo ≅ segment qr segment on ≅ segment qp ∠ n ≅ ∠ r ∠ o ≅ ∠ q

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?