Question: when you subtract like terms how do you know what number to subtract from the other? for example: 3x+4+10x-9=180, do I do 3x-10x or 10x-3x???​

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 are the soultion(s) to the quadratic equation 40- x^2=0

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t