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3 years ago

If arc AB = 130°, calculate the m angle ABC circle O with chord AB and tangent BC; the measure of angle ABC is x

Mathematics

1 answer:

suter [353]3 years ago

4 0

The measure of angle ABC would be 66 degrees

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We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of

sergiy2304 [10]

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

Sample mean = 8

Sample standard deviation = 2

90% Confidence interval

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729$

Margin of error:

$t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$1.729(\frac{2}{\sqrt{20}} ) = 0.773$

7 0

3 years ago

-2(6+s) Greater than or equal to -15 - 2s

Eddi Din [679]

Answer:

I'm leaning mostly towards C Because there is a solution, None of them are real numbers and if they were, S would = 5 Especially positive S

~ Zachary

7 0

3 years ago

Ig nobody uses comments anymore :/

marta [7]

Answer:

Step-by-step explanation:

9+10 is 19.

8 0

2 years ago

The two triangles are similar. What is the value of x?

Ghella [55]

Answer:

x=5

Step-by-step explanation:

We can write ratios to help us solve

4x 12 +3

---------- = ------------

3x+1 12

Using cross products

4x*12 = (3x+1) * (15)

48x = 45x +15

Subtract 45x from each side

3x =15

Divide by 3

3x/3 =15/3

x=5

5 0

2 years ago

What is the Value of X please help!

Brums [2.3K]

Answer:

x = 7cm

Step-by-step explanation:

$\frac{36}{6} = \frac{42}{x}\\\\6 = \frac{42}{x}\\\\x = \frac{42}{6} = 7$

4 0

2 years ago