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Bumek [7]
4 years ago
15

Who can help me ? please​

Mathematics
2 answers:
yarga [219]4 years ago
8 0

Answer:

Step-by-step explanation:

\frac{2x3}{3x3} \\

multiplying by three because you want the denominator same as the other.

  \frac{6}{9}

+ \frac{1}{9}

Add the numerators and keep the denominator the same - the denominator never gets added by the way. You only multiply them to get the denominators to equal

\frac{7}{9}

Masja [62]4 years ago
4 0

Answer:

\dfrac{7}{9}

Step-by-step explanation:

\dfrac{2}{3}=\dfrac{2\cdot 3}{3\cdot 3}=\dfrac{6}{9} \\\\\\\dfrac{6}{9}+\dfrac{1}{9}=\dfrac{7}{9}

Hope this helps!

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Scores on the GRE are normally distributed with a mean of 514 and a standard deviation of 92. Use the 68-95-99.7 rule to find th
SpyIntel [72]

Answer:

2.5%

Step-by-step explanation:

The percentage of people taking the test who are above 698 is ___%

Empirical rule formula states:

95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ

From the question, we have:

Mean of 514 and a Standard deviation of 92

Hence:

μ ± xσ

514 ± 92x = 698

514 + 92x = 698

92x = 698 - 514

92x = 184

x = 184/92

x = 2

Hence, the data is correct and it is 2 standard deviation from the mean. Therefore, 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

The question is asking us to find the percentage of people taking the test who are above 698 is calculated as:

100 - 95% /2

= 5/2

= 2.5%

The percentage of people taking the test who are above 698 is 2.5%

8 0
3 years ago
Peter sold an article for $3600 gaining one sixth of its selling price. Find the cost price and the gain percent.
Ivahew [28]

Answer:

See the answers below

Step-by-step explanation:

Given data

Cost of artilce= $3600

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Hence the Gain is

=1/6*3600

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=$600

The Gain Percent is

=600/3600*100

=0.1666*100

=16.66%

5 0
3 years ago
What is 56+70-26? please show work!
Nina [5.8K]
Well Step 1 is to do 56-26.
56
+70
=126  So we did that and it came out to 126.
    Now we have to do 126-26.
126
-26
=100 in which 100 is your FINAL ANSWER!!!!
8 0
3 years ago
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Nataliya [291]

Answer: 62.8in

Step-by-step explanation:

The formula for circumference is C=2πr. Put the values of 10 in for r and 3.14 in for pi, and you get an equation that looks like C=2(3.14)(10). Solving this equation gets you 62.8.

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2 years ago
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Anna [14]

Answer: 60 dollars

Step-by-step explanation:

The formula is n x 4 = p so using that formula for 15 is

15 x 4 = p

15 x 4 = 60 dollars

6 0
3 years ago
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