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xxMikexx [17]
3 years ago
7

Simplify. I'm don't know how to type it so I am going to take a picture.​

Mathematics
2 answers:
Vesnalui [34]3 years ago
8 0

Answer:2/1

Step-by-step explanation:

kap26 [50]3 years ago
3 0
<h3>Answer: The fraction 1/3</h3>

===========================

Explanation:

Let's focus on adding 8/9 to -5/6

To do this, we need the denominators to be the same. The LCD is often the best choice, but you could pick any common denominator.

LCM of 9 and 6 is 18

8/9 = 16/18 after multiplying top and bottom by 2

-5/6 = -15/18 after multiplying top and bottom by 3

So,

8/9 + (-5/6) = 16/18 - 15/18 = 1/18

The two fractions up top combine to 1/18

----------------

The original expression turns into (1/18) over (1/6)

This is the same as

(1/18)*(6/1)

since we flip the second fraction and multiply. Let's simplify that

(1/18)*(6/1)

(1*6)/(18*1)

(6*1)/(6*3)

1/3

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morpeh [17]

The predictive value of a positive test is is 0.43.

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This question is solved using the concepts of sensitivity and specificity.

  • Sensitivity: It is the true negative rate, that is, the proportion of people without the disease that test negative.
  • Specificity: It is the true positive rate, that is, the proportion of people with the disease that test positive.

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  • Sensitivity of 60% means that of the 100 - 10 = 90% of people without the disease, 60% test negative and 100 - 60 = 40% test positive.
  • Specificity of 70% means that of the 10% with the disease, 70% test positive.

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The predictive value of a positive test is:

Probability of a positive test, which is 40% of 90% plus 70% of 10%, so:

p = 0.4\times0.9 + 0.7\times0.1 = 0.43

The predictive value of a positive test is is 0.43.

A similar question is given at brainly.com/question/22373775

7 0
2 years ago
Abdi's bowling scores for June were 117, 98, 104, 121, 105, 104, 120, and 111. What is the mean of this data?
elena-s [515]
The first thing that you have to do is line it up from least to greatest: 98,104,104,105,111,117,120,121. Then you add all of the numbers and divide the total of all the number of scores she has. 880/8=110. 110 is the answer of your question. ( I got 8 because I had to count all the numbers and I got 880 because I added all the numbers).
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I need help plz will give brainliest!!!
Leokris [45]

Answer:

18 red marbles

Step-by-step explanation:

Because the ratio of yellow marbles to red marbles is 1:6 in the population, the expected number of red marbles is 6 times the number of yellow marbles in the representative sample. there should be 18 red marbles.

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lorasvet [3.4K]

Can you insert a photo of the question please it would greatly help me answer this

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3 years ago
Can you help with this question? I am kinda stuck.
ruslelena [56]

Answer:

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Step-by-step explanation:

The cube has 6 equal faces.

<u>Total surface area:</u>

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2 years ago
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