) En un árbol de Navidad hay bombillos rojos, verdes y azules.
Los rojos se encienden cada 15 segundos; los ver-
des, cada 18 y los azules, cada 10. ¿Cada cuántos
segundos los tres tipos de bombillos se encienden al
mismo tiempo?​

Show me how you find the value of each variable and determine what the value of each variable is you i appreciate it : )

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Question 10 of 211 pointuse the elimination method to solve the system of equations. choose thecorrect ordered pair.10x +2y = 643x - 4y = -36a. (4,12)b. (-3, 11)c. (2,10)d. (-5, 8)