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neonofarm [45]
2 years ago
7

B 20 A 19 С What is the length of BC?

Mathematics
1 answer:
vladimir2022 [97]2 years ago
4 0

Answer:

6.245

Step-by-step explanation:

........... .....

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Solve this problem. -16r=272
adelina 88 [10]

Answer:

-17

Step-by-step explanation:

-16r=272

16r=-272

r=-17

5 0
2 years ago
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X* square root of 3 =34
disa [49]

Answer:

17.49286

Step-by-step explanation:

Photomath :)

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3 years ago
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Does 10p/2q = 5p/q<br> I think it is not equal but it doesn't seem right.
motikmotik

Answer:

Yes, those two are equal.

Step-by-step explanation

(10p/2q)*2/2=5p/q

5 0
3 years ago
Which expression has the same value as the one below?
marta [7]

Answer:

answer is B 38-18

Step-by-step explanation:

38 + (-18)

38-18

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3 years ago
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Could someone help me rnnn?
GuDViN [60]

Answer:

vertex = (0, -4)

equation of the parabola:  y=3x^2-4

Step-by-step explanation:

Given:

  • y-intercept of parabola: -4
  • parabola passes through points: (-2, 8) and (1, -1)

Vertex form of a parabola:  y=a(x-h)^2+k

(where (h, k) is the vertex and a is some constant)

Substitute point (0, -4) into the equation:

\begin{aligned}\textsf{At}\:(0,-4) \implies a(0-h)^2+k &=-4\\ah^2+k &=-4\end{aligned}

Substitute point (-2, 8) and ah^2+k=-4 into the equation:

\begin{aligned}\textsf{At}\:(-2,8) \implies a(-2-h)^2+k &=8\\a(4+4h+h^2)+k &=8\\4a+4ah+ah^2+k &=8\\\implies 4a+4ah-4&=8\\4a(1+h)&=12\\a(1+h)&=3\end{aligned}

Substitute point (1, -1) and ah^2+k=-4 into the equation:

\begin{aligned}\textsf{At}\:(1.-1) \implies a(1-h)^2+k &=-1\\a(1-2h+h^2)+k &=-1\\a-2ah+ah^2+k &=-1\\\implies a-2ah-4&=-1\\a(1-2h)&=3\end{aligned}

Equate to find h:

\begin{aligned}\implies a(1+h) &=a(1-2h)\\1+h &=1-2h\\3h &=0\\h &=0\end{aligned}

Substitute found value of h into one of the equations to find a:

\begin{aligned}\implies a(1+0) &=3\\a &=3\end{aligned}

Substitute found values of h and a to find k:

\begin{aligned}\implies ah^2+k&=-4\\(3)(0)^2+k &=-4\\k &=-4\end{aligned}

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

\implies y=3(x-0)^2-4=3x^2-4

So the vertex of the parabola is (0, -4)

5 0
2 years ago
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