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3 years ago

The perimiter of each face of a rubiks cube is 22.2 centimeters. What is the length of and edge of the rubiks cube?

Mathematics

1 answer:

ivanzaharov [21]3 years ago

5 0

Answer:

3.7 cm

Step-by-step explanation:

22.2 / 6 = 2.7

Hope that helps!

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What are the solutions of x^2-2x+5=0

sweet [91]

The solution of $x^{2}-2 x+5=0$ are 1 + 2i and 1 – 2i

<u>Solution:</u>

Given, equation is $x^{2}-2 x+5=0$

We have to find the roots of the given quadratic equation

Now, let us use the quadratic formula

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$ --- (1)

<em><u>Let us determine the nature of roots:</u></em>

Here in $x^{2}-2 x+5=0$ a = 1 ; b = -2 ; c = 5

$b^2 - 4ac = 2^2 - 4(1)(5) = 4 - 20 = -16$

Since $b^2 - 4ac < 0$ , the roots obtained will be complex conjugates.

Now plug in values in eqn 1, we get,

$x=\frac{-(-2) \pm \sqrt{(-2)^{2}-4 \times 1 \times 5}}{2 \times 1}$

On solving we get,

$x=\frac{2 \pm \sqrt{4-20}}{2}$

$x=\frac{2 \pm \sqrt{-16}}{2}$

$x=\frac{2 \pm \sqrt{16} \times \sqrt{-1}}{2}$

we know that square root of -1 is "i" which is a complex number

$\begin{array}{l}{\mathrm{x}=\frac{2 \pm 4 i}{2}} \\\\ {\mathrm{x}=1 \pm 2 i}\end{array}$

Hence, the roots of the given quadratic equation are 1 + 2i and 1 – 2i

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3 years ago

Juanita and Nina are bowling together. The probability of Juanita getting a strike next game is 24%. The probability of Nina get

Ivanshal [37]

Answer:

Step-by-step explanation:

0.24 is greater than 0.17, and therefore J's getting a strike next game is more likely.

5 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=2x%2B7-1%3D2x%2B7" id="TexFormula1" title="2x+7-1=2x+7" alt="2x+7-1=2x+7" align="absmiddle" cl

Goshia [24]

Answer:

Step-by-step explanation:

$2x + 7 - 1 = 2x + 7$

$= > 2x - 1 = 2x + 7 - 7$

$= > 2x - 1 = 2x$

$= > - 1 = 2x - 2x$

$= > x = - 1$

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3 years ago

5.3: Solutions on a Number Line

andrew11 [14]

Answer:

idfk

Step-by-step explanation:

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3 years ago

Easy 50 points, one multi choice question

kotegsom [21]

D is the correct answer

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3 years ago

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