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Marina86 [1]
2 years ago
12

Find each probability if you pick to marble without replacing the first (G=green; R=red; Y=yellow).

Mathematics
1 answer:
Ber [7]2 years ago
8 0

Answer:

D

Step-by-step explanation:

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Please answer both parts, will give first answer brainliest
S_A_V [24]

Answer:#1- 3.0 in. #2- 11.0 in.

Step-by-step explanation:

5 0
3 years ago
The focus of a parabola is (0, -3) and the directrix is y = 3. What is the equation of the parabola?
OleMash [197]

Answer:

The equation of the parabola is y = -12\cdot x^{2}.

Step-by-step explanation:

Since the directrix is of the form y = a, the parabola is vertical. The vertex of the parabola (V(x,y)) is the midpoint between the focus (F(x,y)) and a point of the directrix (P(x,y)), that is to say:

V(x,y) = \frac{1}{2}\cdot F(x,y) + \frac{1}{2}\cdot P(x,y) (1)

If we know that F(x,y) = (0, -3) and P(x,y) = (0, 3), then the coordinates of the vertex of the parabola:

V(x,y) = \frac{1}{2}\cdot (0, -3) + \frac{1}{2}\cdot (0, 3)

V(x,y) = (0, 0)

The vertex factor (p) is the distance of the focus with respect to the vertex:

p = \sqrt{[F(x,y)-V(x,y)]\,\bullet \,[F(x,y)-V(x,y)]} (2)

If we know that F(x,y) = (0, -3) and V(x,y) = (0, 0), then the vertex factor is:

p = \sqrt{0^{2}+(-3)^{2}}

p = -3

The equation of the parabola in the vertex form is described below:

y - k = 4\cdot p \cdot (x-h)^{2} (3)

Where:

x - Independent variable.

y - Dependent variable.

h, k - Coordinates of the vertex.

If we know that (h,k) = (0, 0) and p = -3, then the equation of the parabola is y = -12\cdot x^{2}.

6 0
2 years ago
What is the value of x?
trapecia [35]
3/4 = x / 7.5
4x = 3(7.5)
4x = 22.5
  x = 5.625
8 0
3 years ago
Need Help PLZ!!!!!!!!!!!!
d1i1m1o1n [39]

The answer is A. Because you can’t lose the amount of steps you took.

4 0
3 years ago
How do I do this?<br> Im stuck on what to do
Nastasia [14]
CD and DE are equal distance so their equations are equal:
2x+7 = 4(x-3)
2x+7 = 4x-12
Subtract 2x from both sides
7 = 2x-12
Add 12 to both sides
19 = 2x
9.5 = x
Now that u have x just plug it into the equation for DE
4(9.5-3)
38-12
26 is the answer
6 0
3 years ago
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