Select all of the following that have the same value as 30,452. A. (3 x 1,000) + (4 x 100) + (5 x
10) + (2 x 1)

B. (3 x 104) + (4 x 10') + (5 x 10²) + (2 x 10')
C. 30,000 + 400 + 50 + 2

D. thirty thousand, four hundred fifty-two

E. (3 x 104) + (4 x 10²) + (5 x 10') + (2 x 10°)

F. thirty-four thousand, fifty-two

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.

What situation is an example of an observational study

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)