Hello! i need urgent with this question!

on your own graph paper construct the pre-image triangle abc with coordinates a(2,1), b(4,1), and c(4,4).
next rotate the triangle 90 degrees. (counterclockwise)
what quadrant is the rotation in and what are the coordinates of the new image?
now, rotate the new image 180 degrees. what are the coordinates of this rotated image?
how can you tell without graphing what the new coordinates are of this rotated figure?

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.

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e. g. 98.765).

Ill mark the brainliest if you me with the these three questions 7,8,9