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Minchanka [31]
3 years ago
8

Write an expression for the calculation 84 divided into sevenths added to 9 divided into thirds.

Mathematics
1 answer:
sertanlavr [38]3 years ago
7 0

(9 \div 3) + (84 \div 7)
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An example of dependent events is drawing a red marble out of one jar and then drawing a
sladkih [1.3K]

Answer:

Second Option:

"green marble out of the same jar, without replacing the first marble"

Step-by-step explanation:

Two events r and s are independent if the probability that r occurs does not affect the probability that s occurs.

When choosing an object of some color b from a jar with n objects where there are x objects of the desired color b, the probability of obtaining 1 object of color b when randomly selecting an object from the jar is:

P_1 =\frac{x}{n}

If after taking the object it does <em>not return</em> it to the jar (without replacement) then, now the probability of obtaining an object of color b is:

P_2 = \frac{x-1}{n-1}   if the one selected in the first trial was the color b.

P_2 = \frac{x}{n-1}   if the one selected in the first test was not  the color b

Note that now the probability P <em>depends on the result obtained in the previous test.</em>

<em>This event is </em><em>dependent</em><em>.</em>

However, if by take object b in the first test, and the object is <em>returned</em> to the jar, and then the second test is made, then

P_1 = P_2.

The probability  does <em>not depend on the result of the first trial</em>. The same happens if the objects are taken from <em>different jars</em>.

<em>These would be </em><em>independent</em><em> events.</em>

Finally the correct option is the second option.

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3 years ago
Why is 16:14 and 64:60 not equivalent
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The 2 ratios are almost equivalent, but not quite. In order to tell if they are equivalent, there are a number of ways but the 2 most common are 1, finding the decimal equivalent of the fraction, and 2, finding the scale factor. 

1: Take 16, divide by 14. You should get something around 1.142. Take 64, divide by 60. You should get something around 1.066666.... Not equivalent.

2: Find the scale factor between the 2. To find scale factor, divide the larger numerator and larger denominator by the smaller numerator and smaller numerator. 64/16, 60/14. Not equal. 
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Answer:

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Step-by-step explanation:

I don't Understand what the Question Is.

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Ugo [173]
The Best answer out of the answers above is option 3. A trapezoid has only 1 set of parallel sides.

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Answer:

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