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3 years ago

Find the value of x... assume segments that appear tangent are tangent.

Mathematics

1 answer:

steposvetlana [31]3 years ago

5 0

Answer:

x=12

Step-by-step explanation:

a^2 + b^2 = c^2

5^2 + b^2 = 13^2

25 + b^2 = 169

b^2= 144

b=12 Therefore,

x=12

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The sum of three numbers is 9. The sum of the first two numbers is 6 more than twice the third number. The second number is the

Westkost [7]

A+b+c=9
a+b=c+6
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3 years ago

11+2p= p +4 What is the answer for this ? Please help !

skad [1K]

Answer:

p=-7

Step-by-step explanation:

11+2p=p+4

2p-p=-11+4

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3 years ago

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blagie [28]

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3 years ago

Round 543,982 to the nearest thousand.

Ratling [72]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

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3 years ago