Answer:
The correct definitions are a, c and d
Explanation:
The definitions of system, heat energy and chemical energy are correct but the definition of surrounding is not correct.
Fossil fuels are nonrenewable
The planets orbit the sun along the ecliptic plane
The answer to this problem is 11 because I did the inverse the inverse of subtraction is addition so I added 7+4 that gave me 11 than I subtracted 11-7 that gave me 4 so x=11
Answer:
The answer should be 15 although its debatable. Many sources say different things but out of every source I looked at 15 was the only one mentioned from your answers. I thought it was 15 but before I answered I wanted to be correct