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
Veseljchak [2.6K]
3 years ago
12

Write the number 0.21212121.. as a fraction let x=

Mathematics
1 answer:
tino4ka555 [31]3 years ago
7 0
There are 2 repeating decimals, so you will need a 1 followed by 2 zeros which is 100. You'll use 100 soon to multiply an equation.

Let's call the decimal number x.

Write   

        x =     0.212121...

Then multiply the equation above by 100, and write it above that equation.
You end up with

    100x = 21.212121...
          x =   0.212121...

Now set it up as a subtraction, and subtract the second equation from the first equation:

    100x = 21.212121...
          x =   0.212121...
- ----------------------------
      99x = 21

Now solve for x. Divide both sides by 3:

33x = 7

Divide both sides by 33:

x = 7/33

Since x = 0.212121..., an d x = 7/33, that means 0.212121... must equal 7/33.

Answer: the fraction is 7/33
You might be interested in
2. What equation does the model below<br> represent?<br> -<br> -
Novay_Z [31]

Answer:

minus

Step-by-step explanation:

it means minus maybe think that what it means

6 0
3 years ago
Read 2 more answers
Brandon is half as old as his brother Ryan.Ryan is one eight the age of his fatherb if their father is 2 years old. How old are
Agata [3.3K]
1/8 of 32 is 4 so if Ryan is 4 then Brandon is 2 

so Ryan = 4 and Brandon = 2 
4 0
3 years ago
What’s the answer to (16-x)2?
Oxana [17]

Answer:

-x + 18

Step-by-step explanation:

just add 16 and 2. this is the furthest it can be simplified

6 0
3 years ago
I don’t understand this can someone please please help!!!!!!!!!!
AnnyKZ [126]

Answer:

172 ft 2

Step-by-step explanation:

SA=2lw+2lh+2hw, for

A=2(lw + lh + hw)=2·(7 · 2+ 8 · 2 + 8 · 7)= 172 ft 2.

Hope this helps,

Best of Luck!

8 0
3 years ago
Which equation can be used to find the area of the blue triangle?
kvv77 [185]
Answer: B) A=1/2(7)(12).

Explanation: The formula for area of a triangle is 1/2bh. Only B maintains this formula.
5 0
2 years ago
Read 2 more answers
Other questions:
  • The sum of six and five times a number h
    7·1 answer
  • If Bridget needs three hours to paint a room, how much work will she get done in an hour of time?
    6·1 answer
  • Can you help me?? please
    14·1 answer
  • Give one positive and one negative coterminal angle for 135°
    9·1 answer
  • CAN SOMEONE HELP!!!!
    15·1 answer
  • Rachel uses 75 inches of ribbon to make 4 bows. She uses the same amount of ribbon to make each bow. 1 foot = 12 inches 1 yard =
    10·1 answer
  • I need this, this is for all you math lovers out there.<br><br>3 more on my page
    5·2 answers
  • D. Pic
    12·1 answer
  • GEOMETRY Find the volume of the figure
    12·1 answer
  • Sue has 18 sweets.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!