Use Laws of exponents to answer this question. A student said that (9x)-² = - 81x². Is this student correct? Why or why not?

A student said that (9x)-² = - 81x². This student is not correct. (9x)^-2 = 1/(9x)^2 = 1/81x^2

Question

Asked 3/16/2011 3:36:18 PM

Updated 1/4/2015 12:55:41 AM

1 Answer/Comment

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3

A student said that (9x)-² = - 81x². This student is not correct.

(9x)^-2 = 1/(9x)^2 = 1/81x^2

(9x)^-2 = 1/(9x)^2 = 1/81x^2

Added 1/4/2015 12:55:41 AM

This answer has been confirmed as correct and helpful.

Solve for x: x - 2 **Weegy:** x - 2 < 9; x < 9 + 2; x < 11 (More)

Question

Expert Answered

Updated 8/17/2014 8:10:37 PM

0 Answers/Comments

Solve for x: 4x - 5 > 15 **Weegy:**
4x - 5 > 15;
4x > 15 + 5;
4x > 20;
x > 20/4;
x > 5
**User:** Solve for x: -3x - 2 = 10 **Weegy:**
-3x - 2 = 10;
-3x = 10 + 2;
-3x = 12;
x = 12/-3;
x = -4
(More)

Question

Expert Answered

Updated 8/17/2014 8:11:50 PM

0 Answers/Comments

HOW ABOUT THIS ONE TOO. COULD YOU Solve for x: -3x - 2 = 10
**Weegy:** What is your question regarding mathematics and equations? **User:** 3- Solve for x: -3x - 2 = 10 WISH IS THE CORRECT ANWER: x = -4, OR, x = 4, OR, x = -4, OR x = 4 (More)

Question

Expert Answered

Updated 8/17/2014 8:12:26 PM

2 Answers/Comments

-3x - 2 = 10;

-3x = 10 + 2;

-3x = 12;

x = 12/-3;

x = -4

-3x = 10 + 2;

-3x = 12;

x = 12/-3;

x = -4

Added 8/17/2014 8:12:24 PM

This answer has been confirmed as correct and helpful.

Solve for x: 3( x - 2 ) - 5( x + 2 ) -15/2, x -27/2, x < 15/2

Question

Updated 6/2/2018 7:08:41 AM

1 Answer/Comment

3(x - 2 ) - 5(x + 2 ) < 11 ;

3x - 6 - 5x - 10 < 11 ;

-2x - 16 < 11 ;

-2x < 11 + 16 ;

-2x < 27 ;

x > 27/-2 ;

x > -27/2

3x - 6 - 5x - 10 < 11 ;

-2x - 16 < 11 ;

-2x < 11 + 16 ;

-2x < 27 ;

x > 27/-2 ;

x > -27/2

Added 6/2/2018 7:08:41 AM

This answer has been confirmed as correct and helpful.

Given the expression x^6 + x^8 + x^3. What is the degree of the polynomial? **Weegy:** degree is 3 since its the highest exponent. (More)

Question

Expert Answered

Updated 7/18/2014 7:34:21 AM

2 Answers/Comments

The degree of the polynomial is 8. It is the highest degree of any term in the polynomial.

Added 7/18/2014 7:34:18 AM

This answer has been confirmed as correct and helpful.

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