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arsen [322]
3 years ago
6

What is 7/10-1/2 for subtracting fractions

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
8 0
\frac{7}{10} -  \frac{1}{2} \\ 
 \\  \frac{7x1}{10x1}= \frac{7}{10} \\ 
 \\  \frac{1x5}{2x5}= \frac{5}{10} \\ 
 \\  \frac{7}{10} -  \frac{5}{10}= \frac{2}{10} \\ 
 \\ Solution: \frac{2}{10}
Charra [1.4K]3 years ago
7 0
I'm guessing you mean to find the answer. So find a common denominator, which is 10. You can leave 7/10 alone. Now multiply by 5 on both the numerator and denominator of 1/2. It would be 5/10. Now subtract 7/10-5/10. The answer is 2/10. It can be simplified to 1/5. The answer now would be: 1/5
I hope this helps. :-) 
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Scores on an exam follow an approximately normal distribution with a mean of 76. 4 and a standard deviation of 6. 1 points. What
crimeas [40]

If scores on an exam follow an approximately normal distribution with a mean of 76.4 and a standard deviation of 6.1 points, then the minimum score you would need to be in the top 2% is equal to 88.929.

A problem of this type in mathematics can be characterized as a normal distribution problem. We can use the z-score to solve it by using the formula;

Z = x - μ / σ

In this formula the standard score is represented by Z, the observed value is represented by x, the mean is represented by μ, and the standard deviation is represented by σ.

The p-value can be used to determine the z-score with the help of a standard table.

As we have to find the minimum score to be in the top 2%, p-value = 0.02

The z-score that is found to correspond with this p-value of 0.02 in the standard table is 2.054

Therefore,

2.054 = x - 76.4 ÷ 6.1

2.054 × 6.1 = x - 76.4

12.529 = x - 76.4

12.529 + 76.4 = x

x = 88.929

Hence 88.929 is calculated to be the lowest score required to be in the top 2%.

To learn more about normal distribution, click here:

brainly.com/question/4079902

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5 0
1 year ago
Please help quickly !!!!!!!
telo118 [61]

Answer:

the first one

Step-by-step explanation:

5 0
3 years ago
Find missing numbers to make equation true.
faust18 [17]

Answer:

1. 7

2. 9

3. 9

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3 0
3 years ago
Read 2 more answers
A steel factory manufactures and sells steel beams
tankabanditka [31]

Answer:

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The question is bland...

And honestly what even is the question?

Step-by-step explanation:

I'll help but explain the question further

4 0
3 years ago
2^5 + 10=?????????????
Hoochie [10]

Answer:

Answer is 42

Step-by-step explanation:

2^5 + 10

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32 + 10

42

7 0
3 years ago
Read 2 more answers
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