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svetoff [14.1K]
3 years ago
14

If you have a bag of marbles, 5 blue, 2 red, 6 purple, and 5 green, what is the probability of selecting a blue marble?

Mathematics
2 answers:
miv72 [106K]3 years ago
6 0

Answer:

5/18

First, identify how many blue marbles there are (5). That's what the numerator (the top number on the fraction) is going to be. From there, take all the numbers given (5, 2, 6, and 5) and add them up (18). This is what you're goign to put as the denominator (the number on the bottom). Lastly, go and make sure that it can't be simplified at all (find the least common factor of the two if there is one.)

Feliz [49]3 years ago
3 0

Answer:

5/18 or about 0.28

Step-by-step explanation:

5 + 2 + 6 + 5 = 18

5/18 or about 0.28

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Determine the correct set up for solving the equation using the<br> quadratic formula 4x^2-5=3x+4
slava [35]

You need to subtract everything to the left side and set it equal to zero. Combine like terms.

Then, the coefficient of x^2 is a, the coefficient of x is b, and the constant term is c.

4x^2 - 5 = 3x + 4

4x^2 - 3x - 5 - 4 = 0

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x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

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7 0
3 years ago
Situation:
Arturiano [62]

Answer:

t = 6162  years

Step-by-step explanation:

Apparently you are asked to use the constant k = 0.0001 instead of the most common 0.00012. We'll answer the problem using such number you typed, but make sure that there is no omission in your typing.

The equation to use is that for carbon decay:

N(t)=N_0\,e^{-0.0001\,\,t}

If the skull contains 54% of its original amount of C14, then that means that :

N(t)=0.54 \,\,N_0

we use this to solve for the time (t) in our equation:

0.54\,\,N_0=N_0\,e^{-0.0001\,\,t}\\\frac{0.54\,\,N_0}{N_0}=e^{-0.0001\,\,t}\\0.54=e^{-0.0001\,\,t}\\ln(0.54)=-0.0001\,\,t\\t=\frac{ln(0.54)}{-0.0001} \\t=6161.86\,\,years

which rounded to the nearest year as requested gives :

t = 6162  years

8 0
3 years ago
For most people the ratio of the length of their head to their total height is 1:7 use proportions to test your measurements and
alexandr1967 [171]
The correct answer for this question is this one: 5 / 7


<span>There exists the same question from other source that has the continuation of the problem. <em>Use proportions to test your measurements and see if they match this ratio. Height is 5ft</em>

So this how to solve this:

Set the equation as:
7x = 5
x = 5 / 7</span>
7 0
3 years ago
Alex makes ceramic bowls to sell at a monthly craft fair in a nearby city. Every month, she spends $50 on materials for the bowl
Mandarinka [93]
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5 0
3 years ago
The height of dachshunds is usually 1/3 their length. If Mollie is 20 inches long, how tall is she?
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20 inches. Yes, it checks.

8 0
3 years ago
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