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Galina-37 [17]
3 years ago
14

Please help I will give brainliest if two people answer my question

Mathematics
1 answer:
liubo4ka [24]3 years ago
6 0
<span>0.25x2+0.8x−8=0  
same as 5x^2+16-160=0   no obvious factors for rational roots, so use quadratic formula
−(x−3)(x+9)=0   .... the factors are clearly (x-3) and (x+9), no need for formula
3x² = 9   ..... we see x^2=3, so roots are &pm; sqrt(3), no need for formula.
−2x2+5x=7 .... here b^2<4ac, definitely use quadratic formula.</span>
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Simora [160]

We have been given an equation of circle x^2+2x+y^2-2y-14=0. We are asked to find the center and radius of the circle.

First of all, we will write equation of circle is standard form (x-h)^2+(y-k)^2=r^2, where center of circle is at point (h,k) and radius is r.

Let us complete the square for both x and y.

x^2+2x+y^2-2y-14+14=0+14

x^2+2x+y^2-2y=14

Adding half the square of coefficient of x and y term, we will get:

(\frac{2}{2})^2=1^2=1

(\frac{-2}{2})^2=(-1)^2=1

x^2+2x+1+y^2-2y+1=14+1+1

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(x-(-1))^2+(y-1)^2=4^2

Therefore, the center of the circle is (-1,1) and radius is 4 units.

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3 years ago
Which are correct representations of the inequality 6x ≥ 3 + 4(2x – 1)? Check all that apply.
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Answer:

6x ≥ 3 + 4(2x - 1)

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⇔ x ≤ 1/2

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The answer for the question should be:

1 ≥ 2x

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and the first graph.

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URGENT HELP MEEEEE!!!:D
sp2606 [1]

Answer: C: 3rd degree polynomial wit 3 terms.

Step-by-step explanation: The polynomial has 3 terms and the highest degree is 3.

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Answer:

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Step-by-step explanation:

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