Brenda compra en la papeleria plumas a $18 cada una despues regresa y comprea mas plumas pero se las dejan a 17 cada una si en total compro 10 plumas y gasto 171 plumas ¿cuantas plumas compro a cada precio?

What are the domain and range of the functiony = 2(x - 3)2 + 4?

What is the smallest integer n such that n\sqrt{2} is greater than 20

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.