The $60jeans after a
35% discount is
applied
The 20%
discount on a
$55 sweatshirt
The 20% tip on
a $73 meal
The 7% sales tax
on a new
$32,000 car

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.

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?