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eimsori [14]
2 years ago
10

Which expression is equivalent to the given polynomial expression?

Geography
1 answer:
EleoNora [17]2 years ago
5 0

Answer:

D

Explanation:

you have to make groupes.

start with a² part and forget the rest from example.

-4a²-a²=? Now remember - and - is adding up. so -5a², which takes out options a and b, as there are 3a² instead of 5.

now let's take ab part and forge the rest.

-2ab+6ab=? that gives us 4ab. So option c, which says 8ab, is wrong. the last number isn't really important in this case because you've already seen the rest can't be.

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How could sand dunes be held in place to keep them from drifting onto a road?
trapecia [35]

Answer: Sand Dunes Stabilization

Explanation:

Sand Dunes Stabilization is the process of engaging in actions that keep Sand Dunes in place to protect their Natural Habitat status.

Two such actions can be useful in this scenario.

1. Putting up Vegetation

- The roots of plants can help anchor soil which will reduce the rate at which it is blown around by wind or carried off by water. This will therefore reduce the rate at which sand dunes lose sand.

2. Putting up Wooden Fences

- Putting up Wooden Fences would also help reduce the rate sand dunes end up on roads for the simple reason that it would stop some of them from being blown by the wind and in so doing keep them where they are supposed to be.

7 0
3 years ago
Plant material that accumulates and hardens on the floor of a swamp is
Semenov [28]

Answer:

F Anthracite (the hardest coal)

Explanation:

Coal is a sedimentary rock that is formed from plant materials. These plant materials must have been trapped and compacted in an environment where they are not able decay. Such an environment is a swamp.

The first grade of coal that forms initially in such an environment is called PEAT. Peat is soft coal that still contains some plant materials. It has a high moisture content and the amount of carbon is still quite low.

With increasing pressure and compaction, PEAT grades into LIGNITE which has more carbon atoms in it. Lignite is more combustible although it is quite soft too. Lignite grades into SUB-BITUMINOUS coal and then BITUMIOUS coal.

The highest grade of coal is ANTHRACITE which is a hard coal. It has very little moisture content and rich carbon percentage in it. Anthracite yields more energy compared to other forms of coal. Anthracite is basically coal that forms at the greastest pressure. Beyond this pressure, a metamorphic transformation occurs and the coals changes to graphite.

Based on increasing pressure:

PEAT< LIGNITE< BITUMINOUS COAL < ANTHRACITE

4 0
3 years ago
In the word geography, the prefix geo- means _____. A. gem B. world C. universe D. stone
Serhud [2]

Answer:

In the word geography, the prefix Geo means "Earth" but given your answers i would say that the answer would be world.

Explanation:

5 0
3 years ago
Where is Tegucigalpa located?
telo118 [61]
Tegucigalpa is the capital of Honduras. Surrounded by mountains.
7 0
2 years ago
Other than 1 , there are no numbers less than 100that are both perfect squares and perfect cubes. What is a counterexample that
valina [46]
       64

-- the perfect square of  8
and
-- the perfect cube of  4
8 0
3 years ago
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