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S_A_V [24]
4 years ago
6

What is the value of x in the equation 0.3x = 0.2 − 0.2x? 4 1 0.5 0.4

Mathematics
2 answers:
sweet-ann [11.9K]4 years ago
6 0
0.3x = 0.2 - 0.2x

0.5x = 0.2

x =0.2/0.5 = 2/5
stira [4]4 years ago
3 0
Heya!
Let's go through this.
First, we can add 0.2x to both sides, in efforts to get all the x's on one side.
That gets us:
0.5x = 0.2.
Finally, we just divide both sides by 0.5 to isolate x, and that will give us 0.4
Hope this helps!
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Step-by-step explanation:

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Help with a pre-calc question? I'll mark the Brainliest if you explain your answer.
anzhelika [568]

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It has none. Angle A is obtuse, so it would have to be opposite the longest side. If side a is opposite angle A, then that is not the case.

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3 years ago
Which of the following expressions is a factor of the polynomial x 2 +3/2x-1
Elodia [21]

Answer:

\large \boxed{\sf \ \ \ (x+2)(x-\dfrac{1}{2}) \ \ \ }

Step-by-step explanation:

Hello,

let's solve

x^2+\dfrac{3}{2}x-1=0\\\\ 2x^2+3x-2=0 \ \text{multiply by 2}\\\\\\

\Delta=b^2-4ac=9+4*2*2=9+16=25

There are two solutions

x_1=\dfrac{-3-\sqrt{25}}{4}\\\\x_1=\dfrac{-3-5}{4}\\\\x_1=\dfrac{-8}{4}\\\\\boxed{x_1=-2}

And

x_2=\dfrac{-3+\sqrt{25}}{4}\\\\x_2=\dfrac{-3+5}{4}\\\\x_2=\dfrac{2}{4}\\\\\boxed{x_2=\dfrac{1}{2}}

So we can write

x^2+\dfrac{3}{2}x-1\\\\=(x-x_1)(x-x_2)\\\\=(x+2)(x-\dfrac{1}{2})

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0
3 years ago
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