1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
riadik2000 [5.3K]
3 years ago
14

(07.05)

Mathematics
2 answers:
Llana [10]3 years ago
5 0

Answer: n = -2

Step-by-step explanation:

3n +2(n + 2) = 9n + 12

(simplify 2(n + 2)) =

3n + 2n + 4 = 9n + 12

(subtract 9n from both sides)

3n + 2n - 9n + 4 = 12

-4n + 4 = 12

(subtract 4 from both sides)

-4n = 8

(divide -4 from both sides)

n = -2

Nikolay [14]3 years ago
5 0

Answer:

b. -2

Step-by-step explanation:

3n + 2 ( n + 2 ) = 9n + 12

[To simplify, multiply 2 with n and 2]

3n + 2n + 4 = 9n + 12

5n + 4 = 9n + 12

[Add 2n and 3n]

5n + 4 - 9n = 12

[Sign of 9n would change when it's moved from one side of the = to the other]

5n - 9n = 12 - 4

[Similarly, sign of 4 would change from + to -]

- 4n = 8

n = 8/-4

n = -2

Hope this helps :D

You might be interested in
I have one more question before im done so please help and have a good day.
3241004551 [841]

Answer:

  • See below

Step-by-step explanation:

<h3>Part A</h3>

<u>Solve the equation:</u>

  • 6x² + 48x + 120 = 0
  • x² + 8x + 20 = 0
  • x² + 8x + 16 + 4 = 0
  • (x + 4)² + 4 = 0
  • (x + 4)² = - 4

The left side is positive and right side is negative so no solution

<h3>Part B</h3>

There is no intercession with the x-axis, the graph of the function is entirely above the x-axis.

It means the diver won't reach the bottom of the lake

6 0
2 years ago
Please help me! its due today! ill mark the first person to get this right most brilliance, and ill rate you 5 stars and thank u
Lady_Fox [76]
Whew chile thats math ?
6 0
2 years ago
What is the missing<br> symbol (?) to make<br> this true?<br> 54 + 24 ? 23 – 30 = 32
Aloiza [94]

The division ➗ ÷ sign will make the expression correct if you correct the question!

5 0
3 years ago
MATH PLEASEEE I WILL MARK YOU BRAINLIEST!!
USPshnik [31]

Answer:

The second

Step-by-step explanation:

is the correct equation

4 0
2 years ago
Read 2 more answers
What is the graph of this equation ​
OverLord2011 [107]

Answer:

Look at attached image

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • If f and g are differentiable functions for all real values of x such that f(1) = 4, g(1) = 3, f '(3) = −5, f '(1) = −4, g '(1)
    6·1 answer
  • Find the rate of a/b and complete the equivalent ratio 69​
    5·1 answer
  • I will mark you brainlest!
    5·2 answers
  • Decrease 20 sec by 20%
    13·1 answer
  • A cake has two layers. Each layer
    6·1 answer
  • Pls help thanks, i’ll give brainliest if you give me a correct answer
    6·1 answer
  • What is 1m + 3/4 this too hard
    10·2 answers
  • A premedical student at a university was complaining that she had just paid $158. 60 for her human anatomy book, including tax.
    9·1 answer
  • Kiara and Mia went to a county fair. They each paid the same admission fee but they were in a different number of rides. Each ri
    14·1 answer
  • Pls help me with this
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!