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FinnZ [79.3K]
3 years ago
13

Will mark you BRAINLIEST!

Mathematics
2 answers:
attashe74 [19]3 years ago
8 0

Take the triangle as,

→ AB/AD = BC/ED

→ x/x+9 = 1/9

Now by using cross products,

→ 9 × x = 1(x+9)

→ 9x = x+9

Now subtract x from both sides,

→ 9x-x = x+9-x

→ 8x = 9

Then divide by 8 from both sides,

→ 8x/8 = 9/8

→ x = 9/8

So, the value of x is 9/8.

valentinak56 [21]3 years ago
7 0

Answer:

x = 9/8

Step-by-step explanation:

The triangles are similar so we can use ratios to solve

AB         BC

----  = -----------

AD       ED

x            1

----  = -----------

x+9       9

Using cross products

9*x = 1(x+9)

9x = x+9

Subtract x from each side

9x-x = x+9-x

8x = 9

Divide by 8

8x/8 = 9/8

x = 9/8

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3 years ago
A random sample of 18 graduates of a certain secretarial school typed an average of 80.6 words per minute with a standard deviat
insens350 [35]

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= ( 77.27 , 83.93)

Step-by-step explanation:

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The confidence interval of a statistical data can be written as.

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Therefore at 95% confidence/prediction interval is

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