Expand the following:
-(-3 x - 9 y - 49)
-(-49 - 3 x - 9 y) = -(-49) - -3 x - -9 y:
-(-49) - -3 x - -9 y
-(-49) = 49:
49 - -3 x - -9 y
-(-3) = 3:
49 + 3 x - -9 y
-(-9) = 9:
Answer: 49 + 3 x + 9 y
Answer:
The most recent eon is subdivided into three eras and eleven periods.
Explanation:
The geological time scale has been constructed so that it can help in better research and understanding of the past, as well as making it easier to distinguish the past and its characteristics at a certain time. There are larger and smaller divisions in the geologic time scale, with the eon being the largest unit, followed by era, and then period.
The most recent eon is the Paherozoic, starting from 542 million years ago and still going on. It is subdivided into three eras and eleven periods so far. The three eras are:
- Paleozoic
- Mesozoic
- Cenozoic
The eleven periods are:
- Cambrian
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian
- Triassic
- Jurassic
- Cretaceous
- Tertiary
- Quaternary
I believe the correct answer from the choices listed above is option A. It is a Japanese officer worker replaces a portable CD player with a portable MP3 player that is an <span>cultural examples that most likely indicates a larger change in the way people are thinking and acting.</span>
As far as I remember the answer is: Over long periods of time, tectonic forces can cause rocks to fold because of <span>B. Shear Stress.</span>
Climate change is happening, it is caused in large part by human activity, and it will have many serious and potentially damaging effects in the decades ahead. Greenhouse gas emissions from cars, power plants and other man-made sources—rather than natural variations in climate—are the primary cause. These emissions include carbon dioxide — the main greenhouse gas — which has reached a concentration level in our atmosphere that the Earth hasn’t seen for more than 400,000 years. These greenhouse gases act like a blanket, trapping the sun’s warmth near the earth’s surface, and affecting the planet’s climate system.
