Does anyone know how its -25? need an explanation asap!

What is the quadric regression equation that fits these data

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

Which of these would have been most likely to have been a carpetbagger during the reconstruction era? a) a new york businessman who relocated to mississippi b) a former slave who was able to buy land in birmingham c) a carolina-born politician who supported the democratic d) a former confederate officer who owned a farm in memphis eliminate