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Grace [21]
3 years ago
14

Write the number 0.21212121 as a fraction

Mathematics
1 answer:
Montano1993 [528]3 years ago
7 0

If is 0.21212121 then

0.\underbrace{21212121}_{8}=\dfrac{21212121}{1\underbrace{00000000}_{8}}

If is 0.21212121... then

x=0.21212121...\ \ \ |\cdot100\\100x=21.21212121...\\\\100x-x=21.21212121...-0.21212121...\\\\99x=21\ \ \ |:99\\\\x=\dfrac{21}{99}\\\\x=\dfrac{21:3}{99:3}\\\\x=\dfrac{7}{33}\\\\0.21212121...=\dfrac{7}{33}

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Find the x value 4x-28 9x
andriy [413]

Answer: -5.6

Step-by-step explanation:

Simplifying

(4x + -28) = 9x

Reorder the terms:

(-28 + 4x) = 9x

Remove parenthesis around (-28 + 4x)

-28 + 4x = 9x

Solving

-28 + 4x = 9x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9x' to each side of the equation.

-28 + 4x + -9x = 9x + -9x

Combine like terms: 4x + -9x = -5x

-28 + -5x = 9x + -9x

Combine like terms: 9x + -9x = 0

-28 + -5x = 0

Add '28' to each side of the equation.

-28 + 28 + -5x = 0 + 28

Combine like terms: -28 + 28 = 0

0 + -5x = 0 + 28

-5x = 0 + 28

Combine like terms: 0 + 28 = 28

-5x = 28

Divide each side by '-5'.

x = -5.6

Simplifying

x = -5.6

5 0
3 years ago
the angle of depression from the top ski lift is 57 degrees if the vertical distance from the top and bottom ot the lift is 1200
dedylja [7]

Answer:

1200

Step-by-step explanation:

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7 0
4 years ago
I forgot how to do this n they didn’t put an example help me lol
lyudmila [28]

Answer:

60m^2

Step-by-step explanation:

First, find the area of the square as it the missing piece wasn't missing.

    8 x 9 = 72m^2

Then, find the area of the missing section.

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Finally, subtract 12m^2 from 72m^2 and you get 60m^2

3 0
3 years ago
Convert 6 2/5 to a percent?<br><br>A) 6.4%<br>B) 64%<br>C) 640%<br>D) 6,400%​
777dan777 [17]

Answer:

C) 640%

Step-by-step explanation:

6 2/5

Convert it to an improper fraction -

6 2/5 = 32/5

Convert the improper fraction to a decimal -

32/5 = 6.4

Multiply 6.4 by 100

= 640%

Hope this helps :)

4 0
3 years ago
Read 2 more answers
3/5=x/11 solve for x give your answer as an improper fraction in its simplest form
Westkost [7]
I hope my answer help you in your question

8 0
3 years ago
Read 2 more answers
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