3 years ago

Find the value of x

Mathematics

1 answer:

Rom4ik [11]3 years ago

3 0

Answer:

x = 20

Step-by-step explanation:

When a line is on two lines, it means they are congruent. This means they have the same value.

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Answer:

[2(x+10)]°+(3x-30)°=180°[vertically opposite angle]

2x+20+3x-30=180°

5x-10=180°

5x=180-10

5x=170

x=170/5

x=34

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1 year ago

PLEASE HELP ASAP WILL MARK BRAINLIEST<br><br> Solve the quadratic equation <br> 18x^2 -153x -172 =0

Vika [28.1K]

Answer:

The answer is : x = 9.505 and x = -1.005

Step-by-step explanation:

To solve the quadratic equation use the formula :

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

Where a is the coefficient of x² , b is the coefficient of x and c is the numerical term

∵ a = 18 , b = -153 and c = -172

∴ $x=\frac{-(-153)+\sqrt{(-153)^{2}-4(18)(-172) } }{2(18)}$

$x = \frac{18+\sqrt{35793} }{36} &x=\frac{18-\sqrt{35793} }{36}$

∴ x = 9.505 and x = -1.005

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3 years ago

Find the value of c.

hodyreva [135]

Yeah, it is 16, the way they worked it out is correct also

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3 years ago

2 2/3× 1 1/3 , use an area modle to solve

Ilia_Sergeevich [38]

2 2/3=8/3 and 1 1/3=4/3. 8/3×4/3=32/9. 32/9 as a mixed number is 3 5/9.

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3 years ago

Find the value of x ​

Find the value of x