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Vadim26 [7]
3 years ago
7

2/7 into percents ??

Mathematics
2 answers:
ValentinkaMS [17]3 years ago
8 0

Answer:

28.571429\%

Step-by-step explanation:

1) To convert the fraction to a decimal, divide the numerator by the denominator.

2 \div 7

2) Use long division.

0.285714

3) To convert to a percent, multiply the decimal by 100.

0.285714 \times 100 = 28 .571429

4) Add the percent sing.

28.571429\%

<em><u>Therefor</u></em><em><u>,</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>28.571</u></em><em><u>4</u></em><em><u>2</u></em><em><u>9</u></em><em><u>%</u></em><em><u>.</u></em>

mafiozo [28]3 years ago
3 0

Answer:

28.57142857 %

Step-by-step explanation:

Convert the fraction to a decimal, then multiply by  100 .

28.57142857 %

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Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?
jeka94

by Quadratic formula , x^2 + 20 = 2x , values of x are x = 1 \pm (1)i\sqrt{19}} . None of mentioned options are correct according to question!

<u>Step-by-step explanation:</u>

Here we have , expression  x2 + 20 = 2x or , x^2 + 20 = 2x .

We know that Quadratic formula is :

x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}

x^2 + 20 = 2x

⇒ x^2-2x+20=0

a=1\\b=-2\\c=20

Putting this value in equation x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a} :

⇒ x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}

⇒ x = \frac{-(-2) \pm \sqrt{(-2)^{2}-4(1)(20)}}{2(1)}

⇒ x = \frac{2 \pm \sqrt{4-80}}{2}

⇒ x = (\frac{2 \pm 2i\sqrt{19}}{2})

⇒ x = 1 \pm (1)i\sqrt{19}}

Therefore , by Quadratic formula , x^2 + 20 = 2x , values of x are x = 1 \pm (1)i\sqrt{19}} . None of mentioned options are correct according to question!

7 0
3 years ago
<img src="https://tex.z-dn.net/?f=-x%20-3%20%5C%20%20%5Ctextless%20%5C%20%200" id="TexFormula1" title="-x -3 \ \textless \ 0"
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