During the new year celebration there are orange, green purple, and blue fireworks. in how many different orders can the different colors of fireworks appear?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.