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natima [27]
3 years ago
8

Solve in PEMDAS: 3 + [2 + 3 X (6 X 3)]

Mathematics
1 answer:
sladkih [1.3K]3 years ago
3 0
The answer should be 59
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What is the (approximate mass of air in a typical room with dimensions 5.4m×3.8m×2.5m?
Elden [556K]
The answer is 62.84 kg.

To calculate the mass of air (m) we need to use the volume (V) of the air (which is the same as the volume of the room) and the density (D) of the air.
D = m/V

The density of air is: D = 1.225 kg/m³
The volume of air is: V = 5.4m×3.8m×2.5m = 51.3 m³

D = m/V
m = D * V
m = 1.225 kg/m³ * 51.3 m³
m = 62.84 kg
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3 years ago
Please help me please
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7 0
3 years ago
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The planting medium Mrs. Jaz uses to start his seeds in the early spring is hydrophobic. What does that word mean, and why would
Sauron [17]

Answer:

the defenition is: tending to repel or fail to mix with water.

Step-by-step explanation:      

3 0
3 years ago
Factor 81x^2-49y^2 please show work.
svlad2 [7]

Answer:

(9 x - 7 y) (9 x + 7 y)

Step-by-step explanation:

Factor the following:

81 x^2 - 49 y^2

Hint: | Express 81 x^2 - 49 y^2 as a difference of squares.

81 x^2 - 49 y^2 = (9 x)^2 - (7 y)^2:

(9 x)^2 - (7 y)^2

Hint: | Factor the difference of two squares.

Factor the difference of two squares. (9 x)^2 - (7 y)^2 = (9 x - 7 y) (9 x + 7 y):

Answer: (9 x - 7 y) (9 x + 7 y)

5 0
4 years ago
What is the value of x?<br> x = ?
meriva

<em> </em><em>Sum </em><em>of </em><em>both </em><em>the </em><em>angle </em><em>will </em><em> </em><em>1</em><em>8</em><em>0</em><em> </em><em>because</em><em> of</em><em> </em><em>linear </em><em>pair</em>

now, <em>1</em><em>0</em><em>x</em><em> </em><em>-</em><em> </em><em>2</em><em>0</em><em> </em><em>+</em><em> </em><em>6</em><em>x</em><em> </em><em>+</em><em> </em><em>8</em><em> </em><em> </em><em>=</em><em>. </em><em>1</em><em>8</em><em>0</em><em> </em>

<em> </em><em> </em><em>1</em><em>6</em><em>x</em><em> </em><em>-</em><em> </em><em>1</em><em>2</em><em> </em><em>=</em><em> </em><em>1</em><em>8</em><em>0</em>

<em>1</em><em>6</em><em>x</em><em> </em><em>=</em><em> </em><em>1</em><em>9</em><em>2</em><em> </em>

<em>x=</em><em> </em><em>1</em><em>9</em><em>2</em><em>/</em><em>1</em><em>6</em>

<em>x </em><em>=</em><em> </em><em>1</em><em>2</em>

<em>1</em><em>s</em><em>t</em><em> </em><em>angle </em><em>=</em><em> </em><em>1</em><em>0</em><em>0</em>

<em>2</em><em>n</em><em>d</em><em> </em><em>is </em><em>=</em><em> </em><em>8</em><em>0</em>

<em>Hope</em><em> it</em><em> helps</em><em> and</em><em> your</em><em> day</em><em> will</em><em> full</em><em> of</em><em> happiness</em>

8 0
3 years ago
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