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andre [41]
3 years ago
14

\frac{7}{9} \times \frac{5}{6} " alt=" \frac{7}{9} \times \frac{5}{6} " align="absmiddle" class="latex-formula">
what is the answer to this?​
Mathematics
1 answer:
noname [10]3 years ago
8 0

Answer:

\frac{35}{54}

Step-by-step explanation:

When multiplying two fractions, you multiply across always. We have two fractions :

7/9 and 5/6

So multiply across :

\frac{7 * 5}{9 * 6}

\frac{35}{54}

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The inequality x ≥ −10 represents the possible values for x on a number line. Which is NOT a possible value for x? A) −11 B) −10
Serhud [2]

Answer:

A)-11

-11 is less than -10 so it cant be great than -10

3 0
3 years ago
Read 2 more answers
How much money would be collected if 24 sweatshirts were sold?
Rudiy27

Answer:

it depends how much one would cost

Step-by-step explanation:

and when u know how much one costs u can multiply it by 24 :)


8 0
3 years ago
four fifths of senior class went to prom. if 324 seniors went to prom, how many are there in the senior class
konstantin123 [22]

Answer:

The answer to your question is 405, because look divide 324 by 4 becasue thats how many fifths are being used then multiply the answer which is 81 by 405


Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
The estimated daily living costs for an executive traveling to various major cities follow. The estimates include a single room
Alexandra [31]

Answer:

\bar x = 260.1615

\sigma = 70.69

The confidence interval of standard deviation is: 53.76 to 103.25

Step-by-step explanation:

Given

n =20

See attachment for the formatted data

Solving (a): The mean

This is calculated as:

\bar x = \frac{\sum x}{n}

So, we have:

\bar x = \frac{242.87 +212.00 +260.93 +284.08 +194.19 +139.16 +260.76 +436.72 +355.36 +.....+250.61}{20}

\bar x = \frac{5203.23}{20}

\bar x = 260.1615

\bar x = 260.16

Solving (b): The standard deviation

This is calculated as:

\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n-1}}

\sigma = \sqrt{\frac{(242.87 - 260.1615)^2 +(212.00- 260.1615)^2+(260.93- 260.1615)^2+(284.08- 260.1615)^2+.....+(250.61- 260.1615)^2}{20 - 1}}\sigma = \sqrt{\frac{94938.80}{19}}

\sigma = \sqrt{4996.78}

\sigma = 70.69 --- approximated

Solving (c): 95% confidence interval of standard deviation

We have:

c =0.95

So:

\alpha = 1 -c

\alpha = 1 -0.95

\alpha = 0.05

Calculate the degree of freedom (df)

df = n -1

df = 20 -1

df = 19

Determine the critical value at row df = 19 and columns \frac{\alpha}{2} and 1 -\frac{\alpha}{2}

So, we have:

X^2_{0.025} = 32.852 ---- at \frac{\alpha}{2}

X^2_{0.975} = 8.907 --- at 1 -\frac{\alpha}{2}

So, the confidence interval of the standard deviation is:

\sigma * \sqrt{\frac{n - 1}{X^2_{\alpha/2} } to \sigma * \sqrt{\frac{n - 1}{X^2_{1 -\alpha/2} }

70.69 * \sqrt{\frac{20 - 1}{32.852} to 70.69 * \sqrt{\frac{20 - 1}{8.907}

70.69 * \sqrt{\frac{19}{32.852} to 70.69 * \sqrt{\frac{19}{8.907}

53.76 to 103.25

8 0
2 years ago
What is -4=r/20-5? <br> Is it r=20
castortr0y [4]

Answer:

r = 20

Step-by-step explanation:

-4 = r/20 - 5

-4 + 5 = r/20 - 5 + 5

1 = r/20

1 * 20 = r/20 * 20

r = 20

6 0
3 years ago
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