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3 years ago

144kg in the ratio of 9:8:7

Mathematics

1 answer:

ANEK [815]3 years ago

4 0

Step-by-step explanation:

Hey there!

Given;

Ratio = 9:8:7

Let "x" be the common factor. So,

9x+8x+7x = 144

or, 24x = 144

or, x = 144/24

or, x= 6

It's like;

= 9*6:8*6:7*6

= 54:48:42

Therefore, their ratio is 54:48:42.

Hope it helps...

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At 3:30 p.m., you have 15 megabytes of a movie. At 3:45 p.m., you have 75 megabytes. What is the download rate in megabytes per

snow_lady [41]

Because the time moved up by 15 minutes, we would already know that it would be (blank) megabytes per 15 minutes

75 megabytes - 15 megabytes = 60

this would mean 60 megabytes are downloaded per 15 minutes

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both of the answers above would be acceptable :)

7 0

3 years ago

Suppose the number of residents within five miles of each of your stores is asymmetrically distributed with a mean of 25 thousan

ohaa [14]

Answer:

$P(\bar X\:>27.8\:thousand)=3.07\%$

Step-by-step explanation:

Since the number of residents within five miles of each of your stores is asymmetrically distributed, the distribution of the sample means will be approximately normal with a mean of 25 thousand.

The standard deviation of the sample means is:

$\sigma_X=\frac{\sigma}{\sqrt{n} }$

$\implies \sigma_X=\frac{10.6}{\sqrt{50} }=1.4991$

The z value is $z=\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n}} }$

We plug in the values to get:

$z=\frac{27.8-25}{1.4991}=\frac{2.8}{1.4991}=1.87$

The area to the right of 1.87 is $1-0.96926=0.03074$ .

The probability that the average number of residents within five miles of each store in a sample of 50 stores will be more than 27.8 thousand is 3.07%

See attachment.

6 0

4 years ago

Please answer this correctly

irina [24]

Answer:

100%

Step-by-step explanation:

6 possibilities: 3 odd and 3 even

P(odd or even) 6/6= 100%

5 0

3 years ago

3m-5m-12=7m-88-5 plz show all work

hammer [34]

3m - 5m - 12 = 7m - 88 - 5

-2m - 12 = 7m - 88 - 5

-2m - 12 = 7m - 93

-12 = 7m - 93 + 2m

-12 = 9m - 93

-12 + 93 = 9m

81 = 9m

9 = m

hope that helps, God bless!

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4 years ago

I can knit a sock in 15 minutes, how long will it take to complete 3 pairs of socks?

damaskus [11]

Answer:

45 minutes

Step-by-step explanation:

First,

Multiply 15 by 3 to know the time.

15 x 3 = 45

Hope this helps!!

7 0

3 years ago

144kg in the ratio of 9:8:7​

144kg in the ratio of 9:8:7