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pav-90 [236]
3 years ago
10

How to solve this 7/8 n=63

Mathematics
1 answer:
Tasya [4]3 years ago
7 0
Answer : n=72

Explanation: 7/8 n = 63
Multiply both sides of the equation by 8/7
8/7 x 7/8 n = 8/7 x 63
Reduce the numbers with the greatest common factor 8
1/7 x 7n = 8/7 x 63
Reduce the number with the greatest common factor 7
n=8/7 x 63
Reduce the number with the greatest common factor 7
n=8 x 9
Multiply the number
n=72
That’s how I got the answer
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An incomplete distribution is given below:Variable You are given that the median value is 70 and the total number of items is 20
expeople1 [14]

Answer:

The missing frequencies are x = 8 and y = 43.

Step-by-step explanation:

Median Value =70

Then the median Class =60-80

Let the missing frequencies be x and y.

Given: Total Frequncy = 200 , Median = 46

\left|\begin{array}{c|ccccccc}Value&0-20&20-40&40-60&60-80&80-100&100-120&120-140\\Frequency&12&30&x&66&y&27&14\\$Cumu.Freq&12&42&42+x&108+x&108+x+y&135+x+y&149+x+y\end{array}\right|

From the table

\sum f_i =149+x+y  

Here, n = 200

n/2 = 100

Lower Class Boundary of the median class, l=60

Frequency of the median class(f) =66

Cumulative Frequency before the median class, f=42+x

Class Width, h=10

Median = l + \dfrac{\dfrac{n}{2} - c.f }{f} \times h

70 = 60+ \dfrac{100- 42+x }{66}\times 10\\70 = 60+ \dfrac{58+x }{66}\times 10\\70-60=\dfrac{58+x }{66}\times 10\\10*66=10(58+x)\\58+x=66\\x=66-58\\x=8

200=149+x+y

200=149+8+y

y=200-(149+8)

y=43

Hence, the missing frequencies are x = 8 and y = 43.

8 0
3 years ago
Write a complete two-column proof for the following information. Hint: Use the Angle Addition Theorem and the fact that a line i
kramer

Answer:

Step-by-step explanation:

Given: m∠1 = 62° and lines t and l intersect

Prove: m∠4 = 62°

Proof:

Statement                                        Reason

m∠1 = 62°                                         Given

m∠1 , m∠2 are supplementary       t is a straight line hence linear pair.

m∠4 , m∠2 are supplementary       r is a straight line hence linear pair.

Angle 2=180-62 = 118                      Definition of supplementary angles

Angle 4 = 180-118 =62                     -do-

Angle 1 = Angle 4                            Equality property

Hence proved

6 0
3 years ago
Read 2 more answers
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Elena L [17]

Answer: 492 miles

Step-by-step explanation:

The first thing to do in such a question is to find out the number of miles Violet can go on 1 gallon.

That figure is:

= 369 / 12

= 30.75 miles per gallon

With 16 gallons therefore, she can go:

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= 492 miles

6 0
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Kaylis [27]

x + (x + 2) + 38 = 180

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exis [7]

Answer:

0.2, 0.21, 0.25 (1/4), 0.2666666 (4/15)

Step-by-step explanation:

8 0
3 years ago
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