IM BEING TIMEDDD PLEASE HEL Choose the correct simplification of (6x3 − 7x − 4) + (4x3 + 8x + 3). (5 points)

2x3 − 15x − 7
10x3 + x − 1
2x3 + 15x + 6
10x3 − x − 1

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.

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Which of the following describes how to translate the graph y = |x| to obtain the graph of y = |x+1|+1? shift 1 unit left and 1 unit down shift 1 unit left and 1 unit up shift 1 unit night and 1 unit down shift 1 unit nght and 1 unit up