Which of the following is not a theory for the decline of the Mayan civilization?
a.
a natural disaster
c.
a lack of invention and adaptation
b.
the invasion by another group
d.
an internal revolt

The invasion by another group is not a theory for the decline of the Mayan civilization. en.wikipedia.org/wiki/Minoan_civilization

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Mayang30|Points 3592|

Question

Asked 12/1/2014 7:52:12 AM

Updated 12/1/2014 8:08:08 AM

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Solve the equation by factoring.
x2 = 81 a. {81,9}
b. { -9,9} c. {9,0} d. {0,0}

Question

Updated 12/2/2014 8:11:24 PM

1 Answer/Comment

x^2 = 81

when x*x = 9*9 , x= 9

when x*x= (-9)*(-9) , x= -9

So the solution for x^2 = 81 is {-9 ,9} .

when x*x = 9*9 , x= 9

when x*x= (-9)*(-9) , x= -9

So the solution for x^2 = 81 is {-9 ,9} .

Added 12/2/2014 8:11:24 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [12/2/2014 8:21:40 PM], Rated good by andrewpallarca

Solve the equation by factoring.
x2 = 81

Question

Updated 12/4/2014 10:11:41 PM

1 Answer/Comment

x^2 = 81

x^2 - 81= 0

(x - 9)(x+ 9) = 0

when x - 9 = 0 , x = 9

when x + 9 = 0 , x = -9

x^2 - 81= 0

(x - 9)(x+ 9) = 0

when x - 9 = 0 , x = 9

when x + 9 = 0 , x = -9

Added 12/4/2014 10:11:41 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [12/5/2014 4:31:24 AM], Rated good by andrewpallarca

Solve the equation by using the Square Root Property.
x2 - 2x + 1 = 18

Question

Updated 12/4/2014 2:17:39 AM

1 Answer/Comment

x^2 - 2x + 1 = 18

(x - 1)^2 = 18

x - 1 = ±3*2^1/2

x = ±3*2^1/2 + 1

(x - 1)^2 = 18

x - 1 = ±3*2^1/2

x = ±3*2^1/2 + 1

Added 12/4/2014 2:17:39 AM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [12/4/2014 6:58:34 AM]

Which of the following is the sum of the solutions of x2 - 2x -8 = 0?
a.
-6
c.
2
b.
-4
d.
-2
**Weegy:** The sum of x2 - 2x -8 = 0 is equal to d. -2 (More)

Question

Updated 12/1/2014 7:14:29 AM

1 Answer/Comment

x^2 - 2x - 8 = 0;

(x - 4)(x + 2) = 0;

x - 4 = 0;

x = 4;

x + 2 = 0;

x = -2;

The sum of of the solutions of x^2 - 2x -8 = 0 is 2.

4 + (-2) = 2

(x - 4)(x + 2) = 0;

x - 4 = 0;

x = 4;

x + 2 = 0;

x = -2;

The sum of of the solutions of x^2 - 2x -8 = 0 is 2.

4 + (-2) = 2

Added 12/1/2014 7:14:27 AM

This answer has been confirmed as correct and helpful.

Write a synonym of the word manifest. **Weegy:** A synonym for manifest is: palpable. (More)

Question

Updated 12/3/2014 1:21:51 PM

0 Answers/Comments

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