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Nookie1986 [14]
4 years ago
15

Please help me please!!!!!

Mathematics
1 answer:
kvasek [131]4 years ago
6 0
Since PQ is tangent to the circle, angle PQO is 90°.

Since the sum of angles of any triangle must be 180° we can say:

180-90-12=x  thus:

x=78°
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Write the equation of the parabola that has its x-intercepts at (1+<img src="https://tex.z-dn.net/?f=%5Csqrt%7B5%7D" id="TexForm
VladimirAG [237]

Answer:

y=2x^2-4x-8

Step-by-step explanation:

<u>Factored form of a parabola</u>

y=a(x-p)(x-q)

where:

  • p and q are the x-intercepts.
  • a is some constant.

Given x-intercepts:

  • (1+√5, 0)
  • (1-√5, 0)

Therefore:

\implies y=a(x-(1+\sqrt{5}))(x-(1-\sqrt{5}))

\implies y=a(x-1-\sqrt{5})(x-1+\sqrt{5})

To find a, substitute the given point (4, 8) into the equation and solve for a:

\implies a(4-1-\sqrt{5})(4-1+\sqrt{5})=8

\implies a(3-\sqrt{5})(3+\sqrt{5})=8

\implies4a=8

\implies a=2

Therefore, the equation of the parabola in factored form is:

\implies y=2(x-1-\sqrt{5})(x-1+\sqrt{5})

Expand so that the equation is in standard form:

\implies y=2(x^2-x+\sqrt{5}x-x+1-\sqrt{5}-\sqrt{5}x+\sqrt{5}-5)

\implies y=2(x^2-x-x+\sqrt{5}x-\sqrt{5}x+\sqrt{5}-\sqrt{5}+1-5)

\implies y=2(x^2-2x-4)

\implies y=2x^2-4x-8

6 0
2 years ago
Find the equation of the line parallel to the graph of 14x-7y=1 that passes through the point at (-2,4)
Alla [95]

Answer:

The equation of the line would be y = 2x + 8

Step-by-step explanation:

In order to find the equation of the line, we first need to find the slope of the original line. We can do that by solving for y.

14x - 7y = 1

-7y = -14x + 1

y = 2x - 1/7

Now that we have a slope of 2, we know the new slope will be the same since parallel lines have the same slope. So we can use it along with the point in point-slope form to find the equation.

y - y1 = m(x - x1)

y - 4 = 2(x + 2)

y - 4 = 2x + 4

y = 2x + 8

8 0
4 years ago
76<br> 34<br> х<br> Find the missing angle measures:<br> m ZX =<br> m ZY<br> m ZZ =
Veseljchak [2.6K]
Angle Y = 104 degrees
Angle X = 70 degrees
7 0
4 years ago
To the nearest degree, what is the measure of the central angle for gardening?
tia_tia [17]
The best degrees would be 8°
8 0
4 years ago
Read 2 more answers
Find the length of the diameter of a sphere with a surface area of 452.39^2 ft.
mash [69]

surface area = 4*pi*r^2

using 3.14 for pi

452.39 = 4*3.14*r^2=

452.39=12.56* r^2

r^2 = 452.39/12.56 = 36.0


sqrt(36) = 6= r

diameter = 2r = 6*2= 12

 diameter = 12 feet

4 0
3 years ago
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