Please help I’m struggling

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?