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FinnZ [79.3K]
3 years ago
12

What is the answer if you expand -7(k - 3)

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
7 0
The answer is -7k + 21
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Describe the three base materials in soil in terms of porosity and permeability.
777dan777 [17]

<u>Porosity:</u>

  1. Porosity is an intrinsic property of every material.
  2. It refers to the amount of empty space within a given material.
  3. In a soil or rock the porosity (empty space) exists between the grains of minerals.
  4. The amount of water a material can hold is directly related to the porosity since water will try and fill the empty spaces in a material.
  5. We measure porosity by the percentage of empty space that exists within a particular porous media.

<u>Permeability:</u>

  1. Permeability is another intrinsic property of all materials and is closely related to porosity.
  2. Permeability refers to how connected pore spaces are to one another.
  3. If the material has high permeability than pore spaces are connected to one another allowing water to flow from one to another, however, if there is low permeability then the pore spaces are isolated and water is trapped within them.
7 0
3 years ago
1. 2x + 7 = 2x - 7<br><br> 2. 3x + 8 = -2x + 8<br><br> 3. 4(x + 1) = 4x + 4
ddd [48]
1.
2x+7=2x-7
2x-2x=-7-7
0=-14
Math error.

2.
3x+8=-2x+8
3x+2x=8-8
5x=0
x=0


3.
4(x+1)=4x+4
4x+4=4x+4
4x-4x=4-4
0=0
Correct
7 0
3 years ago
Read 2 more answers
Find the mode for a data set. 18,24,24,24,25,37,37,46
Sphinxa [80]

Answer:

24 is the mode

Step-by-step explanation:

Mode is the number that is most often seen.

18 is seen 1 time

24 is seen 3 times

25 is seen 1 time

37 is seen 2 times

46 is seen 1 time

24 is the mode because it is seen the most often.

4 0
3 years ago
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The two figures are regular hexagons.<br><br> What is the scale factor, written in decimal form?
Schach [20]
\frac{15}{6} \\ \frac{5}{2} =\\2.5
3 0
3 years ago
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A recipe for a loaf of bread requires 2/3 cup of flour. How many cups of flour would it take to make 15 loaves of bread?
Mars2501 [29]

Answer:

10

Step-by-step explanation:

1 loaf if bread= 2/3 cup

15 loaves of bread= 2/3 × 15

= 10

5 0
2 years ago
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