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alexira [117]
3 years ago
11

X^2-9 The expression above is equivalent to which of the following?

SAT
1 answer:
tankabanditka [31]3 years ago
4 0
Your answer would be (x+3)(x-3).
Using the foil method to simplify an equation, you would multiply x by x, 3 by 3 and so on.
Hope this helps!
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The equation: 2pb(no₃)₂ --> 2pbo + 4no₂ + o₂ shows the decomposition of lead nitrate. How many grams of oxygen are produced w
SashulF [63]

Answer:

Explanation:

Hi there!

2Pb (no₃) -------> 2Pb + 4no₂ + o₂

Molecular mass of 4no₂ = 184g

Molecular mass of o₂ = 32g

From the reaction;

When 184 g of no₂  was formed 32 g of oxygen was formed.

When 1 g of no₂  was formed 32/184 g of oxygen was formed.

When 11.5 g of no₂  was formed (32/184)*11.5 g of oxygen was formed.

Therefore, when 11.5 g of no₂  was formed 2 g of oxygen was formed.

Hope it helps!

8 0
2 years ago
Which of the following is not an effective study strategy?
nevsk [136]

Answer:

2

Explanation:

5 0
3 years ago
Read 2 more answers
which of the answer choices correctly describes the movement of water across a selectively permeable membrane during osmosis?
maw [93]

During osmosis, a statement which correctly describes the movement of water across a selectively permeable membrane is: 3. Either of these descriptions is correct and equivalent.

<h3>What is osmosis?</h3>

Osmosis can be defined as a process which typically involves the movement of a solvent molecule such as water through a selectively or permeable membrane from a region of high concentration to a region of lower concentration.

This ultimately implies that, the process of osmosis can be illustrated by the movement of water into root hair cells because they are used by the plants to absorb water from the soil.

In conclusion, the movement of water of from high water concentration to low water concentration and from low solute concentration to high solute concentration are statements which correctly describes the movement of water across a selectively permeable membrane during osmosis.

Read more on osmosis here: brainly.com/question/13587341

#SPJ1

Complete Question:

Which of the answer choices correctly describes the movement of water across a selectively permeable membrane during osmosis.

1. The water will move from high water concentration to low water concentration.

2. The water will move from low solute concentration to high solute concentration.

3. Either of these descriptions is correct and equivalent.

6 0
1 year ago
Can some one right the name of each moon phase in a row please.
Degger [83]

Answer:

New

Waxing Crescent

First Quarter

Waxing Gibbous

Full

Waning Gibbous

Third Quarter

Waning Crescent

Explanation:

Hope this helps!

6 0
3 years ago
Read 2 more answers
Which one of these would have the strongest gravitational pull?
Rzqust [24]

Answer:

a large dance star

Explanation:

because it is bigger and heavier

6 0
3 years ago
Read 2 more answers
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