Which equations show the associative property?
select each correct answer.
a. 0.75+(−1.25+(−0.33))=(0.75+(−1.25)) +(−0.33)
b. 2.16+(−6.7+(−9.23))=2.16+(−9.23+(−6 .7))
c. (−3.45+(−0.12))+(−5.8)=−(3.45+0.12) +(−5.8)
d. (−4.6+(−2.1))+3.1=−4.6+(−2.1+3.1)

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.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.