All categories

3 years ago

In circle K, what is the value of x?

Mathematics

1 answer:

djyliett [7]3 years ago

8 0

Answer:

18°

Step-by-step explanation:

A diameter cuts a circle into two arcs that are each 180°. An inscribed angle that intercepts an arc of 180° has a measure of 90°. Thus we have ...

... 5x = 90°

.. 90°/5 = x = 18°

You might be interested in

Solve for x, and refer to the attached image.

AVprozaik [17]

Answer:

x=8

Step-by-step explanation:

7+5x

so basically what you have to do is take the 7 and subtract from both sides

so like this: 7-7 is 0 so that cancels then 47-7 is 40

then you take 5x and divide 40 by 5

so x=8

hope this helped!

4 0

3 years ago

A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled

klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}$

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

$\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5$

The standard deviation of the sample is calculated as:

$s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8$

Then, we can calculate the standard error of the mean as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}=\frac{26.8}{6}= 4.5$

6 0

3 years ago

A company had net cash flows from operations of $120,000, cash flows from financing of $330,000, total cash flows if $500,000 an

AlexFokin [52]

450,500 because 120,000 and 330,000 and 500 thats the answer

5 0

3 years ago

5x^2-44x+130=-30+16x

sweet [91]

Answer:

if its answer for x its

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Please help! I need help with this multiple choice question, thank you.

coldgirl [10]

Answer:

A. SAS B. SSS C. AAS D. ASA

Step-by-step explanation:

A: Line segments AE and EB are congruent and line segments CE and ED are also congruent. The Angles in between line segments AE and EB and line segments CE and ED are congruent to each other

B: Line segments QT and TS are congruent. Line segments QR and RS are congruent. Both triangles share line segment TR

C: Angles A and B are congruent. Angles D1 and D2 are congruent. Line segment CD is shared between both triangles.

D: Angles C1 and C2 are congruent. Angles B1 and B2 are congruent. Line segment CB is shared between the two triangles.

7 0

3 years ago