What is the empirical formula for a substance if a 200 g sample of it contains 54 grams of nitrogen, 15 grams of hydrogen, and 132.6 grams of chlorine?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the sunflower? ? plz write a proportion to solve i will give you 100 points

Sioux co. replaced the roof on its existing building, therefore increasing the building's life by 10 years. the cost of the roof is considered a(n):