First to subtract by the 3 from the both sides. Then cross out 3 -3 it equals to 0.
(3n+7)
-3 -3
~~~~~~
4
Answer is n=4
C. Shanghai and the terra-cotta warriors belong together
Answer:
Sedimentary rocks are the rocks that are formed as a result of compaction and lithification of sediments. These are directly obtained from the sediments of the pre-existing rock. These sediments after weathering of the rocks are transported from one place to another with the help of agents such as wind, water, and ice. These sediments are then deposited at a different place. Then, it finally turns into sedimentary rocks. For example, Shale, Sandstone and Limestone.
The common minerals that are found to be present in the sedimentary rocks are feldspar, clay minerals, and mica. The sediments such as quartz and clay minerals are derived by chemical weathering of rocks that act as a cementing material holding the sediments together. These sedimentary rock-forming minerals are abundant on the earth's surface and are comparatively much stable. So, with time, they undergo compaction and solidification and forms sedimentary rocks.
The countries of the Arabian peninsula solve the problem of obtaining the scarcest resource by building industrial plants to remove the salt from seawater to use it for irrigation and drinking.
Answer: Option A
<u>Explanation:</u>
- Water is the scarcest resource of the Arabian peninsula as being the desert land form.
- The availability of potable water is scarce and has access to saline water which cannot be drunk or used for irrigation.
- Therefore, industrially treated saline water removes salt from the sea water and then can be used for drinking and irrigation purpose.
