5y-8x-y+12x combine like terms to simplify

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

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