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Bad White [126]
3 years ago
15

What is the value of the discriminate of the quadratic equation -1=5x^2-2x

Mathematics
1 answer:
tatyana61 [14]3 years ago
7 0
\bf -1=5x^2-2x\implies 0=5x^2-2x+1
\\\\\\
\begin{array}{llccll}
0=&{{ 5}}x^2&{{ -2}}x&{{ +1}}\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array}
\\\\\\
discriminant\implies b^2-4ac
\implies (-2)^2-4(5)(1)
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What is the area of the polygon in square units? <br><br>​
prisoha [69]

Answer:

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Step-by-step explanation:

As with many composite area problems, this can be worked any of several ways. The attached shows trapezoid ABCE, from which triangle CDE can be removed to get the desired area.

The relevant formulas are ...

  A = (1/2)(b1 +b2)h . . . . . . area of a trapezoid

  A= (1/2)bh . . . . . . . . . . . . area of a triangle

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Here, the trapezoid has bases 12 and 2, and height 12, so its area is ...

  A = (1/2)(12 +2)(12) = 84 . . . . square units

The triangle has a base of 4 and a height of 2, so its area is ...

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Then the area of the desired figure is ...

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3 0
3 years ago
Find the value of x°<br><br> 25°<br><br> 85°<br><br> 75°<br><br> 105°
rosijanka [135]
180 - 155 = 25

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x = 75


Hope I helped!

Let me know if you need anything else!

<span>~ Zoe (Rank:'Genius')</span>
8 0
4 years ago
Read 2 more answers
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RoseWind [281]

Answer:

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Step-by-step explanation:

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3 years ago
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gayaneshka [121]
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Does the answer help you?

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