Which of the following illustrates the Addition Property of Inequalities? Group of answer choices

Both of these.

If a b, then a + c > b + c

Neither of these.

HELP M quick

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

How do you solving the solution of each system using elimination?