2 years ago

Quadrilateral abcd is inscribed in this circle. what is the measure of angle a?

1 answer:

8 0

Look at the picture.

$(x+2)+(3x+6)=180\\\\4x+8=180\ \ \ \ |-8\\\\4x=172\ \ \ \ |:4\\\\x=43$

$m\angle A=(3\cdot43+6)^o=135^o$

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vlabodo [156]

Answer: 1.467

Step-by-step explanation:

Formula of Margin of Error for (n<30):-

$E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 22

Level of confidence = 0.90

Significance level : $\alpha=1-0.90=0.10$

By using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.05}= 1.720743$

Standard deviation: $\sigma=4$

Then, we have

$E=(1.720743)\dfrac{4}{\sqrt{22}}=1.46745456106\approx1.467$

Hence, the margin of error for the confidence interval for the population mean with a 90% confidence level =1.467

5 0

2 years ago

xenn [34]

Answer:

x = 6

Step-by-step explanation:

Pardon the bad handwriting

7 0

3 years ago

katrin [286]

Answer:

I'm pretty sure the answer is B also known as 35

5 0

2 years ago

Ket [755]

-3 1/2

just add the fractions

Mark brainliest please

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2 years ago

9966 [12]

Slope = -1/2

y-intercept = 6

<3

4 0

2 years ago