Answer: 
Step-by-step explanation:
Given
Propane produced heat energy of 
The volume of the tank is 
The energy produced by this propane tank is

Answer: 1/6
Step-by-step explanation:
Slope is the m in y=mx+b
Sorry for taking so long. Try typing in the whole question on google you will get lots of websites, it wasn't letting me post any here.
All the websites have $45 for the second sentence, but idk if they could help.
And when you figure it out let me know because it was really bothering me. lol
(-x²-2x+6)+(-9x²-7x+6) = -x²-2x+6-9x²-7x+6 = -10x² - 9x + 12