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2 years ago

(3x - 20° (3x – 20)° 4xº 4xº (3x – 20° (3x – 20) What is the value of x?

Mathematics

1 answer:

sergij07 [2.7K]2 years ago

8 0

Step-by-step explanation:

<h3>this is given that the figure is a hexagon</h3><h3>let give a name to the given hexagon be ABCDEF</h3>

<h3>Angle a + B + C + D = 720 ( Ls sum pro. of hexagon)</h3><h3>3x-20+3x-20+4x+4x+3x-20+3x-20 = 720</h3><h3>3x+3x+3x+3x+4x+4x-20-20-20-20 = 720 (rearranging)</h3><h3>20x - 80 = 720</h3><h3>20x = 720 + 80 </h3><h3>x=800/20</h3>

<h2>x = 40 degrees </h2>

<h2>I HOPE THAT THIS ANSWER HELPS YOU</h2>

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The value of 9−y is twice the value of y. What is the value of y?

ElenaW [278]

Answer:

y = 3

Step-by-step explanation:

9 - y = 2y

<u>Step 1: Add y to both sides</u>

9 - y + y = 2y + y

9 = 3y

<u>Step 2: Divide both sides by 3</u>

9 / 3 = 3y / 3

3 = y

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3 years ago

The area of a circle is 153.86 square meters. What is the diameter of the circle? Use 3.14 for π.

iren2701 [21]

Answer:

14m

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

153.86 = 3.14 r^2

Divide each side by 3.14

153.86 /3.14 = r^2

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Take the square root of each side

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d = 2r

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d =14

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2 years ago

Using substitution <br> x+3y=3<br> 3y-2x=12

frez [133]

Step-by-step explanation:

<u>Given </u><u>:</u><u>-</u>

x + 3y = 3
3y - 2x = 12

And we need to solve the equation using Substituting method . So on taking the first equation ,

$\rm\implies x + 3y = 3 \\\\\rm\implies x = 3 - 3y$

<u>Put </u><u>this</u><u> </u><u>value</u><u> </u><u>in </u><u>(</u><u>ii)</u><u> </u><u>:</u><u>-</u><u> </u>

$\rm\implies 3y - 2x = 12 \\\\\rm\implies 3y - 2(3-3y)=12\\\\\rm\implies 3y -6-6y = 12 \\\\\rm\implies -3y = 18 \\\\\rm\implies y = -6$

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$\\\\\rm\implies x = 3-3*-6 \\\\\rm\implies x = 3+18 \\\\\rm\implies x = 21$

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