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sergejj [24]
3 years ago
12

What's 7/9 divided by 8/15

Mathematics
2 answers:
kotykmax [81]3 years ago
7 0
Dividing by a fraction is the same as multiplicating by its inverse, I mean:
(a/b)/(c/d) = <span>(a/b)(d/c)
so for the fractions we have:
</span><span>7/9 divided by 8/15
= (7/9)/(8/15)
</span><span>= (7/9)(15/8)
</span>= 7*15/9*8
= 105/72
= 35/24
statuscvo [17]3 years ago
5 0
35 over 24 or do u want it in a decimals 
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According to a 2010 study conducted by the Toronto-based social media analytics firm Sysomos, 71% of all tweets get no reaction.
klemol [59]

Answer:

a) the expected number of tweets with no reaction is 71 tweets

b) the variance is 20.59 tweets² ( ≈ 21 tweets )and the standard deviation is

4.537 tweets (≈ 5 tweets)

Step-by-step explanation:

we can use the binomial probability distribution

P(x, N, p ) = N!/[(N-x)!x!] * p^x * (1-p)^(N-x)

where

x = number of successful events

N = population total

p = probability for success for every individual and independent event

P = probability for x successful events

in our case p = 71% = 71/100 (probability of a tweet without reaction) , N = 100 tweets

a) the expected number of tweets

E(x) = N* p = 100 tweets * 71/100 = 71 tweets

b) the variance is

V(x) = N * p * (1-p)

V = 100 * 71/100 * (1-71/100) = 71* 29/100 = 20.59 tweets² ( units of variance are [N²] )

the standard deviation is

s = √V = √20.59 tweets² = 4.537 tweets

6 0
3 years ago
The table shows how many males and females attended two different movies. How would you find the joint relative frequency of bei
kirza4 [7]

Answer:

B. Divide 124 by 229.

Step-by-step explanation:

Given the table

\begin{array}{cccc}&\text{Action}&\text{Drama}&\text{Total}\\ \\\text{Male}&105&124&229\\ \\\text{Female}&99&151&250\\ \\\text{Total}&204&275&479\end{array}

The <u>joint relative frequency</u> is the ratio of the frequency in a particular category and the total number of data values.

The total number of males =229

The number of males that like drama =124

So, to find the joint relative frequency of being male and attending a drama movie, you should divide 124 by 229.

8 0
3 years ago
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Dafna11 [192]

Mr. and Mrs. Manning tipped 15%.

8 0
3 years ago
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What is the quotient when the sum of — 1/2 and -- 3/4 is divided by the product of
docker41 [41]
What I got was 9/10 or you could make it into a percentage 90% hope this helps
4 0
2 years ago
Rewrite in simplest terms: -8(7y-8)-3(7y-7)−8(7y−8)−3(7y−7)
anzhelika [568]

Answer:

-8(7y-8)-3(7y-7)−8(7y−8)−3(7y−7)

Distribute to remove the parentheses.

Collect like terms

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Step-by-step explanation:

7 0
3 years ago
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