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
amm1812
3 years ago
11

Solve for CD using the following image

Mathematics
2 answers:
zalisa [80]3 years ago
4 0

Answer:

CD = CB - DB \\ CD = 12 - (x - 9) \\ { \tt{but \: CD = 2x - 9}} : \\ 2x - 9 = 21 - x \\ 3x = 30 \\ x = 10 \\  \\ { \bf{CD = 12 - (10 - 9)}} \\ CD = 11

AleksandrR [38]3 years ago
3 0

<em>Here</em><em>,</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>BC</em><em> </em><em>=</em><em> </em><em>12</em>

<em> </em><em>CD</em><em>+</em><em>BD</em><em>=</em><em>12</em>

<em>2x</em><em>-</em><em>9</em><em>+</em><em>x</em><em>-</em><em>9</em><em> </em><em>=</em><em>12</em>

<em>3x</em><em>-</em><em>18</em><em> </em><em>12</em>

<em>3x</em><em> </em><em>=</em><em>12</em><em>+</em><em>18</em>

<em>x</em><em> </em><em>=</em><em>30</em><em>/</em><em>3</em>

<em>x</em><em> </em><em>=</em><em>10</em>

<em>Now</em><em>,</em>

<em> </em><em> </em><em> </em><em> </em><em>CD</em><em> </em><em>=</em><em> </em><em>2x</em><em>-</em><em>9</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>2</em><em>×</em><em>10</em><em>-</em><em>9</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>20</em><em>-</em><em>9</em>

= 11

Therefore,CD = 11

Hope this solution may help you!!☺

You might be interested in
51.03 is 88% of what number
Tcecarenko [31]
I would use a proportion

51.03/88% = x/100%

Which is saying: if 51.03 is 88% of the number, what is 100% of the number

Cross multiply to get x=57.99
5 0
2 years ago
Can someone help me please
Trava [24]

Answer:

5n units

Step-by-step explanation:

C=2πr =2·π·2.5

5 0
3 years ago
Which type of factoring is used to factor the following expression:<br> 2x^2 + 7x- 30
svetlana [45]

Answer:

 (2x - 5) • (x + 6)

7 0
3 years ago
Help me asap .... will crown brainiest !
Makovka662 [10]

Answer:

B of course you dummy

Step-by-step explanation:

4 0
2 years ago
Help plsssss can someone also explain the diagram ​
lyudmila [28]
The answer is C.

Explanation: There are 3 x variables and on the other side you see 11.

So the answer is 3x = 11
8 0
3 years ago
Other questions:
  • Show work explain with formulas.
    7·2 answers
  • Simplify 1/3(6x−12)+4x
    10·1 answer
  • Which simpler problems could be calculated to solve this problem?
    9·2 answers
  • The height of the triangle is
    5·1 answer
  • A man walks for x hours at a speed of
    14·1 answer
  • Is 5-2y=3x a linear equation
    6·2 answers
  • What is KN+IK?<br><br> Please help me asap ty
    15·2 answers
  • Solve the equation <br> -3x-11=2(4x-8)-6
    13·2 answers
  • ASAPPPPPP<br> NO LINK OR FILE<br> GET RIGHT, BRAINEST!
    9·1 answer
  • 9-(-0.87)-0.3 will someone please help me I can’t remember how todo this and my kid needs my help!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!