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]
4 years ago
12

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

Mathematics
1 answer:
tino4ka555 [31]4 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
The product of -12 and a number is 60​
rewona [7]
The answer to this question is 20
8 0
3 years ago
Read 2 more answers
The lowest point of the st Lawrence river is 294 feet below sea level. The top of mt. Jacques Cartier is 1,277 feet above sea le
juin [17]

Answer:

1571 feet higher

Step-by-step explanation:

Let sea level be at the point 0

So,

294 feet BELOW sea level would be -294

and,

1277 feet ABOVE sea level would be 1277

THe difference in height thus is:

1277 - (-294) = 1277 + 294 = 1571 feet higher

8 0
3 years ago
If you can buy 4⁄5 of a pound of ham for 3 dollars, how much can you purchase for 10 dollars? Write your answer as a fraction of
Zarrin [17]
(4/5 #)/$3 = x/$10

x = (10/3)*(4/5 #) = 8/3 #

You can buy 8/3 pound for $10.
3 0
3 years ago
Find an equation of the line passing through the pair of points (3,4) and (-5.-5). Write the equation in the form Ax+By = C
bezimeni [28]
Answer:

???

What are the answer choices?
5 0
3 years ago
William and Debra Pierce are celebrating their 20th anniversary by having a reception at a local reception hall. They have budge
erica [24]

The greatest number of people that William and Debra may invite and still stay within their budget is 63.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Since William and Debra have budgeted $2,500 for their reception. Therefore, their total expenses should be equal to the total expenses in the reception.

Budget = Total expenses

Budget = Reception hall Cleanup charge + $38 per person fee

Let the number of people invited to the party be represented by x,

$2,500 = $100 + $38(x)

2500 = 100 + 38x

2500 - 100 = 38x

2400 = 38x

x = 2400 / 38

x = 63.157 ≈ 63

Hence, the greatest number of people that William and Debra may invite and still stay within their budget is 63.

Learn more about Equation here:

brainly.com/question/14686792

#SPJ1

5 0
2 years ago
Other questions:
  • A model rocket is launch from the ground with initial velocity of 352 ft/sec how long will it take the rocket to reach its maxim
    10·1 answer
  • Evaluate. Be smart.<br><br>(2.31∙5.82+4.18∙2.31+90∙2.31)÷2.31∙0.55
    7·2 answers
  • (1-x2)2+3.7(1-x2)+2.1=0
    13·1 answer
  • Whats the absolute value of -8×4
    9·1 answer
  • Question on the paper
    11·1 answer
  • The figure is a square. Its diagonals meet to form four right angles. What is the approximate value of x?
    9·2 answers
  • A sample of households is conducted by selecting numbers randomly from the phone book. In this community 4% of households have n
    9·1 answer
  • Plz help me first one gets most brainliest and points​
    9·2 answers
  • CAN SOMEONE PLEASE HELP ME!! THANK YOU
    15·2 answers
  • Pls need answer fast
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!