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suter [353]
4 years ago
11

Describe the earths lithosphere include the depths and different parts

Social Studies
1 answer:
horrorfan [7]4 years ago
6 0
Earth's lithosphere. Earth's lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth. The lithosphere is subdivided into tectonic plates. ... The lithosphere is underlain by the asthenosphere which is the weaker, hotter, and deeper part of the upper mantle.
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An insured has a life insurance policy with a face amount of $500. He pays a premium each week to the agent who sold him the pol
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Answer:

Industrial life                                                    

Explanation:

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7 0
3 years ago
A fish laying hundreds of eggs is an example of _________.
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C producing offspring
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Solve using any appropriate method. If the system has an infinite number of solutions, use set-builder notation to write
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Answer:

13.\ (x,y) = (-4,3)

14.\ No\ Solution

15.\ (x,y) = (-12,-32)

16.\ (x,y) = (3.75,6.25)

17.\ No\ Solution

Explanation:

13)

4x + 8y = 8 ---- (1)

5x + 7y = 1 ------ (2)

Multiply equation by 5 and equation 2 by 4

5(4x + 8y = 8)

4(5x + 7y = 1)

5 * 4x + 5 * 8y = 5 * 8\\4*5x + 4*7y = 4 *1

20x + 40y = 40 ------ (3)

20x + 28y = 4 ------ (4)

Subtract equation 3 from 4

(20x + 28y = 4) - (20x + 40y = 40)

20x - 20x+ 28y -40y= 4-40

-12y = -36

Divide both sides by -12

\frac{-12y}{-12} = \frac{-36}{-12}

y = 3

Substitute y = 3 in equation 1

4x + 8y = 8

4x + 8(3) = 8

4x + 24 = 8

Subtract 24 from both sides

4x + 24 - 24 = 8 - 24

4x = -16

Divide both sides by 4

\frac{4x}{4} = \frac{-16}{4}

x = -4

Hence\ (x,y) = (-4,3)

----------------------------------------------

14)

7x + 7y = 8 ---- (1)

5x + 5y = 10 ----- (2)

Make x the subject of formula in (2)

5x + 5y = 10

5x + 5y - 5y = 10 - 5y

5x = 10 - 5y

\frac{5x}{5} = \frac{10 - 5y}{5}

x = \frac{10}{5} - \frac{5y}{5}

x = 2 - y

Substitute x = 2 - y in (1)

7x + 7y = 8

7(2-y) + 7y = 8

Open bracket

7*2-7*y + 7y = 8

14 -7y + 7y = 8

14  \neq 8

At this point, we conclude that thee system has no solution.

----------------------------------------------

15)

y = 3x + 4 --- 1

5x + y = -92 ----2

Substitute y = 3x + 4 in (2)

5x + 3x + 4 = -92

8x + 4 = -92

Subtract 4 from both sides

8x + 4 -4= -92 -4

8x = -96

Divide both sides by 8

\frac{8x}{8} = \frac{-96}{8}

x = -12

Substitute x = -12 in equation 1

y = 3x + 4

y = 3(-12) + 4

y = -36 + 4

y = -32

Hence\ (x,y) = (-12,-32)

----------------------------------------------

16)

0.4x + 0.4y = 4

0.4x - 0.4y = 1

Add both equations

(0.4x + 0.4y = 4) + (0.4x - 0.4y = 1)

0.4x+0.4x + 0.4y-0.4y = 4+1

0.8x = 5

Divide both sides by 0.8

\frac{0.8x}{0.8} = \frac{5}{0.8}

x = 6.25

Substitute x = 6.25 in (1)

0.4(6.25) + 0.4y = 4

2.5 + 0.4y = 4

Subtract 2.5 from both sides

2.5 -2.5 + 0.4y = 4 -2.5

0.4y = 1.5

Divide both sides by 0.4

\frac{0.4y}{0.4} = \frac{1.5}{0.4}

y = \frac{1.5}{0.4}

y = 3.75

Hence,\ (x,y) = (3.75,6.25)

----------------------------------------------

17)

x - 4y = 1

x= 7+ 4y

Substitute x= 7+ 4y in (1)

7 + 4y - 4y = 1

7 \neq 1

At this point, we conclude that thee system has no solution.

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4 years ago
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