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4 years ago

Which is a counterexample for the conditional statement shown?

Mathematics

1 answer:

PolarNik [594]4 years ago

5 0

Answer: It is c

Step-by-step explanation: Im doing the test and did some research.

But if you are seweing this on 9/22/2020 please wait for me to put the confirmed answer in the comments.

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The diameter of a circle has endpoints (-10,5) and (-4,11)

Marta_Voda [28]

well, since we know the endpoints for the diameter, its midpoint will be where the center of the circle is located, so

$~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ (\stackrel{x_1}{-10}~,~\stackrel{y_1}{5})\qquad (\stackrel{x_2}{-4}~,~\stackrel{y_2}{11}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left(\cfrac{ -4 -10}{2}~~~ ,~~~ \cfrac{ 11 + 5}{2} \right)\implies \left(\cfrac{-14}{2}~~,~~\cfrac{16}{2} \right)\implies \stackrel{center}{(-7~~,~~8)}$

and if we get the distance between those endpoints, and take half of that, that'd be the radius of it.

$~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{-10}~,~\stackrel{y_1}{5})\qquad (\stackrel{x_2}{-4}~,~\stackrel{y_2}{11})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ \stackrel{diameter}{d}=\sqrt{[-4 - (-10)]^2 + [11 - 5]^2}\implies d=\sqrt{(-4+10)^2+6^2} \\\\\\ d=\sqrt{6^2+6^2}\implies d=\sqrt{72}~\hfill \stackrel{radius=half~that}{\cfrac{\sqrt{72}}{2}} \\\\[-0.35em] ~\dotfill$

$\textit{equation of a circle}\\\\ (x- h)^2+(y- k)^2= r^2 \qquad center~~(\stackrel{-7}{ h},\stackrel{8}{ k})\qquad \qquad radius=\stackrel{\frac{\sqrt{72}}{2}}{ r} \\\\\\\ [x-(-7)]^2~~ + ~~[y-8]^2~~ = ~~\left( \frac{\sqrt{72}}{2} \right)^2\implies (x+7)^2~~ + ~~(y-8)^2~~ = ~~18$

5 0

2 years ago

I need help ASAP somebody

pogonyaev

Answer:

The answer is B

Step-by-step explanation:

Its pretty obvious in the question. she has a starting amount of 150 and all u have to do is the find the slope of her selling t-shirts

Pls mark me as brainliest

8 0

3 years ago

Mr.jonson sells erasers for $3 each.He sold 96 erasers last week and he sold 204 erasers this week.About how much more money did

7nadin3 [17]

Answer: About $300

Step-by-step explanation:

1. To solve this problem and estimate how much more money Mr. Johnson made this week (which you can call x) you must apply the proccedure shown below:

- Round the number of erasers sold:

96 erasers≈100 erasers

204 erasers≈200 erasers

- The amount of money made last week is:

$\$3*100=300\$$

- The amount of money made this week is:

$\$3*200=600\$$

- Now, you must subtract the quantities shown above, then you obtain:

$m=\$600-\$300\\m=\$300$

7 0

4 years ago

Find the area of the composite figure to the nearest hundredth.

Lyrx [107]

Answer:

745.31

Step-by-step explanation:

1. 12.5^2 * 2 = 312.5

2. (3,14 * 156,25)/2 = 245.31

3. (30 * 12.5)/2 = 187.5

4. 187.5 + 245.31 + 312.5 = 745.31

4 0

3 years ago

It costs the quality company $.14 per mile to run its van. On Monday the van traveled 87.6 miles. How much did it cost to run th

aksik [14]

We can find this answer by multiplying .14 by 87.6 to represent 14 cents for every mile.

87.6
<u> .14
</u>12.264

Since we are rounding to the nearest cent, that being the hundredths place, we know that it cost $12.26 to run the van that day.

8 0

4 years ago

Read 2 more answers