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VMariaS [17]
3 years ago
7

There are 5 red marbles, 8 blue marbles, and 12 green marbles in a bag. What is the theoretical probability of randomly drawing

a red marble and then a green marble?
Mathematics
2 answers:
mixas84 [53]3 years ago
8 0

All we have to do is to multiply the probability of drawing a red marble to the probability of drawing a green marble after drawing the red one.


For the probability of drawing a red marble first, it should be a fraction with the number of red marbles as the numerator, and the total number of all marbles as the denominator.

Which means,

5/(5+8+12)

=5/25

=1/5


Now, we need to find the probability of drawing a green marble after drawing a red marble. In short, it means the number of green marbles as the numerator and the total number of all marbles one red marble (since it has been drawn already) as the denominator.

12/(4+8+12)

=12/24

=1/2


Therefore,

1/5 x 1/2

=1/10

=0.1

=10%


vova2212 [387]3 years ago
6 0

Total marbles = 5 + 8 + 12 = 25


P(red then green) = (5/25)(12/24) = 1/10


1/10 = 0.1 = 10%


Answer: 10%

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Formula for Perimeter of Rectangle:

P = 2(L + W)

Plug in 160:

160 = 2(L + W)

L = 4W
<span>So we can plug in '4W' for 'L' in the first equation.</span>
<span>160 = 2(L + W)

160 = 2(4W + W)

Combine like terms:

160 = 2(5W)

160 = 10W

Divide 10 to both sides:

W = 16

Now we can plug this back into any of the two equations to find the length.

L = 4W

L = 4(16)

L = 64

So the width is 16, and the length is 64.</span>
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3 years ago
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Answer:

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Step-by-step explanation:

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The archway to the entrance of an art gallery can be model by y= -1/3(x-5)(x+5) where x and y are measured in feet. The x-axis r
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Answer:

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Step-by-step explanation:

At floor level y=0

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Answer:

The answer is the second figure and the vertices of Δ R'S'T' are:

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Step-by-step explanation:

* Lets revise some transformation

- If point (x , y) reflected across the x-axis

 ∴ Its image is (x , -y)

- If point (x , y) reflected across the y-axis

 ∴ Its image is (-x , y)

- If point (x , y) reflected across the line y = x

 ∴ Its image is (y , x)

- If point (x , y) reflected across the line y = -x

 ∴ Its image is (-y , -x)

- Now we can solve the problem

∵ R = (6 , 6) , S = (3 , -6) , T = (0 , 3), they are the vertices of ΔRST

- The triangle RST is reflected over the y-axis

- According to the rule above the signs of x-coordinates will change

∵ R = (6 , 6)

∴ Its image is (-6 , 6)

∵ S = (3 , -6)

∴ Its image is (-3 , -6)

∵ T = (0 , 3)

∴ Its image is (0 , 3)

* Now lets look to the figure to find the correct answers

- The image of Δ RST is ΔR'S'T'

∵ The vertices of the image of ΔRST are:

  R' = (-6 , 6) , S' = (-3 , -6) , T' = (0 , 3)

* The answer is the second figure

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kolezko [41]
Cost of 380 gram of sweets = (2.1/50) * 380 = $15.96
6 0
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