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34kurt
4 years ago
10

How do u do this problem correctly

Mathematics
2 answers:
Sveta_85 [38]4 years ago
3 0
I think your mistake was you didn't multiply the common multiple by the denominator AND the numerator. By doing this the 1/6 turns into 2/12 and 1/4 turns into 3/12

Add them together and you are left with 5/12!
MrRissso [65]4 years ago
3 0
U have to find the common denominator of the fractions and then you add them
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Rafael is taking a test that contains a section of 12 true-false questions. How many of the possible groups of answers to these
timurjin [86]

Answer:

A

Step-by-step explanation:

Rafael is taking a test that contains a section of 12 true-false questions. At least 6 correct answers of true means that 6 answers are true, 7 are true, 8 are true, 9 are true, 10 are true, 11 are true or 12 are true.

Then

C_6^{12}=\dfrac{12!}{6!(12-6)!}=924,\\ \\C_7^{12}=\dfrac{12!}{7!(12-7)!}=792,\\ \\C_8^{12}=\dfrac{12!}{8!(12-8)!}=495,\\ \\C_9^{12}=\dfrac{12!}{9!(12-9)!}=220,\\ \\C_{10}^{12}=\dfrac{12!}{10!(12-10)!}=66,\\ \\C_{11}^{12}=\dfrac{12!}{11!(12-11)!}=12,\\ \\C_{12}^{12}=\dfrac{12!}{12!(12-12)!}=1.

Hence there are

924+792+495+220+66+12+1=2510

possible groups.

8 0
3 years ago
Please help answer these questions? Be specific on which u are answering thanks!
aivan3 [116]
For 15 you can say... he is incorrect because I know when you add two integers that it's always smaller than the factors
4 0
3 years ago
3. A regular hexagon has six equilateral triangles with a common
hichkok12 [17]

Answer:

if the height of the triangle is 8 in, its side is 9.2379, and this side is also the side of the hexagon, so the perimeter is 6*9.2379 = 55.43 in

Step-by-step explanation:

As the hexagon is regular, each of those triangles will also be regular.

So if the height of one triangle is 8 inches, we can find the side of the triangle with the height formula of a regular triangle:

height = side * sqrt(3)/2

8 = side * 0.866

side = 8/0.866 = 9.2379

The side of the triangle will also be the side of the hexagon. So the perimeter of the hexagon will be:

P = 6 * 9.2379 = 55.43 inches

8 0
3 years ago
If the weights of 1,000 adult men in a county are plotted on a histogram, which curve is most likely to fit the histogram?
melomori [17]
The correct answer among all the other choices is a bell-shaped curve, better known as a normal distribution. This is the curve that is most likely to fit the histogram. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help. 
8 0
4 years ago
The answer below thanks
Greeley [361]

Answer:

The equation of the circle having centre (-5,-9) and radius r=3  is

x² + 10 x +y² + 14 y + 65 = 0

Step-by-step explanation:

<u>Explanation</u>:-

From graph  The centre of the circle  C( -5 , -7)

The radius of the circle r = 3cm from the centre of the given circle

The equation of the circle



From graph the centre ( h, k) = ( -5,-7) and r = 3cm

                 (x-(-5))^2+(y-(-7))^2 = 3^2

                x² + 10 x +25 +y² + 14 y + 49 =9

              x² + 10 x +25 +y² + 14 y + 49 -9=0

 The equation of the circle

                x² + 10 x  +y² + 14 y + 65 = 0  

 



                     

8 0
3 years ago
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