Suponiendo que la altura (en centímetros) de una vela es una función lineal del tiempo (en horas) que permanece encendida. Tras estar encendida 9 horas, una vela mide 18.3 centímetros de alto. Tras estar encendida 26 horas, mide 13.2 centímetros de alto. ¿Cuál es la altura de la vela tras estar encendida 19 horas?

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.

With this one. will mark brainliest

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2