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lara31 [8.8K]
4 years ago
7

20 POINTS HELP QUICK PLEASE

Mathematics
2 answers:
BabaBlast [244]4 years ago
6 0

Answer:

X=-4

Step-by-step explanation:

-2x+4=12

the - which is next to 2x changes the whole equation sign so it can be written like this

2x-4=-12

then the 4 goes to the other side by adding it to the -12

2x=-8 then divide both sides by 2

X=-4

Veronika [31]4 years ago
6 0

Answer:

x = 5

Step-by-step explanation:

4x-3=17

4x = 17+3

4x = 20

<u>4x</u> = <u>20</u>

4       4

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Can someone help me this ? Finding an angle measure for a triangle with an extended side
Sedaia [141]

Answer:

x° =121°

Step-by-step explanation:

The inside angles of a triangle together must equal 180°. Therefore, 58° + 63° + n° = 180° if n equals the third angle inside the triangle. So,

180°-(58°+63°)=n°

180° - 121° = n°

59° = n°

Since the outside angle x and 59° must also equal 180°,

180° - 59° = x°

121° = x°

You can also find the exterior angle without finding the interior by adding the two other interior angles together.

58°+63°=x°

121°=x°

3 0
3 years ago
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if a gas has a volume of 1 L at a pressure of 270 kPa, what volume will it have when the pressure is increased to 540 kPa? Assum
lord [1]
The answer would be: 0.5L

This question can be solved using the ideal gas formula PV=nRT where
P= pressure
V= volume
n= number of molecule
R= constant
T= temperature


In this question, the temperature and number of the particle are not changed. The pressure is changed to twice amount. Since the pressure is inversely related to the volume, the volume should become half of the original.
PV=nRT 
V=nRT/P
V1/V2= (nRT/P1)/(nRT/P2)
V1/V2= (1/270)/(1/540)
V1/V2= (1/1)/(1/2)
V1/V2 = 2
V1= 2V2
1L= 2V2
V2= 1/2 L
8 0
3 years ago
What are the possible values of x in x2 + 3x + 3 = 0?
stealth61 [152]
Hello,

x^2+3x+3=0\\&#10;&#10;\Delta=9-4*3=-3\\&#10;&#10;x= \dfrac{-3-i*\sqrt{3}}{2} \ or\ x= \dfrac{-3+i*\sqrt{3}}{2} \\&#10;&#10;
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luda_lava [24]

Answer:

Kendrick is making a buffet for his family. He needs  3x3/4 of flour to make it.

He doesn't know what store to go to either.

8 0
3 years ago
Solve it! Hurry<br> Will mark as brainliest<br> IF U TRY TO get the points free i would report u
Afina-wow [57]

Answer:

A. 3x^2+7x^2+2×3x ×7-84x = 3x^2+7x^2-2×3x×7

9x^2+49x^2+42x-84 x= 9x^2+49x^2-42x

9x^2+49x^2-42 = 9x^2+49 x^2-42x

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B.

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3 years ago
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