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ivanzaharov [21]
2 years ago
5

The two dot plots below compare the forearm lengths of two groups of schoolchildren:

Mathematics
1 answer:
jeka57 [31]2 years ago
5 0

Answer:

The correct option is B.

Step-by-step explanation:

From the given dot plot we can say that 3 children have 9 in. long forearm,  4 children have 10 in. long forearm and  3 children have 11 in. long forearm.

The average of length of forearms of Group A is

The average of length of forearms of Group A is 10 inches.

From the given dot plot we can say that 3 children have 10 in. long forearm,  5 children have 11 in. long forearm and  2 children have 12 in. long forearm.

The average of length of forearms of Group B is

The average of length of forearms of Group B is 10.9 inches.

10.9>10 it means Group B has longer average forearm length. It is true because two children have a forearm length longer than 11 inches.

Therefore the correct option is B.

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Let G be a connnectde graph with n vertices and m edges. supposed also that m = n. prove that G contains exactly one cycle
ElenaW [278]

Answer:

Contradiction

Step-by-step explanation:

Suppose that G has more than one cycle and let C be one of the cycles of G, if we remove one of the edges of C from G, then by our supposition the new graph G' would have a cycle. However, the number of edges of G' is equal to m-1=n-1 and G' has the same vertices of G, which means that n is the number of vertices of G. Therefore, the number of edges of G' is equal to the number of vertices of G' minus 1, which tells us that G' is a tree (it has no cycles), and so we get a contradiction.

7 0
3 years ago
There are 550 students at Martin Middle School. One bundred and eighty- seven students walk to school. what percent of the stude
Anvisha [2.4K]
For a question like this, all you have to do is remember that a percentage is simply a fraction expressed as a decimal. So, all we have to do is:
\frac{187}{550}, and then multiply our decimal answer by 100 to get the percentage:
\frac{187}{550} = 0.34
0.34 x 100 = 34
Therefore 34% of the students walk to school.
I hope this helped and remember to please try and understand the maths that got the answer, not just writing the answer down :))
4 0
3 years ago
What is -16-15????????????
frozen [14]

Answer:

1

Step-by-step explanation:

to lazy

6 0
3 years ago
Read 2 more answers
If a car travels 825 miles in 15 hours and the car travels at an constant rate how many miles does the car travel in 1 hour?
Doss [256]

Answer:

55 miles

Step-by-step explanation:

Given data

DIstance =  825 miles

Time = 15 hours

Speed= distance/time

Speed= 825/15

Speed= 55  miles per hour

Given that we want to find the distance traveled in 1 hour, we have

Distance= Speed*time

Distance= 55*1

Distance= 55 miles

Hence the car will travel 55 miles in 1 hour

7 0
3 years ago
Mark is 11 years older than his sister. in 8 years he will be twice as old as she will be then.How old are they now
earnstyle [38]
X=Marks sister's age
x+11= Marks age
x+11 +8 = 2x+8
x+19=2x +8
x+19-x=2x-x +8
19-8=x+8-8
11=x Marks sisters age in 8 years
11-8= 3 Marks sisters age now
x+11=22 Marks age in 8 years
22-8= 14 Marks age now

6 0
3 years ago
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