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alexira [117]
3 years ago
8

A bag contains only red and blue marbles. Yasmine takes one marble at random from the bag. The probability that she takes a red

marble is 1 in 5. Yasmine returns the marble to the bag and adds five more red marbles to the bag. The probability that she takes one red marble at random is now 1 in 3. How many red marbles were originally in the bag?
Mathematics
1 answer:
Daniel [21]3 years ago
8 0
The answer is gonna be 40
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If two fair dice are rolled, find the probability of a sum of 6 given that the roll
Aliun [14]

Total outcomes of two rolled dice = 6 x 6 = 36

Possibilities for sum of 6 are 3 + 3, 4 + 2, 2 + 4, 5 + 1, 1 + 5. So total possibilities for sum of 6 are five.

<span>Hence the probability for the sum of 6 = 5/36</span>

7 0
3 years ago
What is the length of AB? Round your answer to the nearest
const2013 [10]
23’3 because I went over the test and I got it correct I’m pretty sure (sorry if I’m wrong I just went with the internet :()
8 0
2 years ago
Find the value of y.<br> one angle - 125 degrees <br> second angle - 36 degrees
ira [324]

Answer:

hence the value of y is 19°

Step-by-step explanation:

y+125+36=180(sum of inside the triangle is 180°)

y+161=180

y=180-161

y=19°

4 0
2 years ago
Verify that the divergence theorem is true for the vector field f on the region
vladimir2022 [97]
By the divergence theorem,

\displaystyle\iint_{\partial\mathcal E}\mathbf f(x,y,z)\cdot\mathrm d\mathbf S=\iiint_{\mathcal E}\nabla\cdot\mathbf f(x,y,z)\,\mathrm dx\,\mathrm dy\,\mathrm dz

where \partial\mathcal E is the boundary of \mathcal E. We have

\nabla\cdot\mathbf f(x,y,z)=\dfrac{\partial(4x)}{\partial x}+\dfrac{\partial(xy)}{\partial y}+\dfrac{\partial(4xz)}{\partial z}=4+x+4x=5x+4

so the flux is

\displaystyle\int_{z=0}^{z=2}\int_{y=0}^{y=2}\int_{x=0}^{x=2}(5x+4)\,\mathrm dx\,\mathrm dy\,\mathrm dz=72
5 0
3 years ago
Help help help help help helo help
Kay [80]

Answer:

50.27

452.39

0.79

Step-by-step explanation:

A=πr2=π·42≈50.26548

A=πr2=π·122≈452.38934

A=πr2=π·0.52≈0.7854

8 0
3 years ago
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