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Gnoma [55]
2 years ago
10

Work out the circumference of this circle take pi (3.142) and give your answer to one decimal place the diameter is 9m

Mathematics
1 answer:
bulgar [2K]2 years ago
4 0

Answer:

28.3

Step-by-step explanation:

9x3.142=28.27800 and if you round that it is 28.3

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If G has n vertices and is regular of degree r, how many edges has G?
sladkih [1.3K]

Answer:

We know that the sum of the degrees of the vertices of the graph is twice the number of edges of the graph.

Let G be a graph with vertices v_1,v_2,\cdots,v_n

Then \sum_{i=1}^ndeg(v_i)=2e\\ where e is the number of edges of the graph. Since the graph is regular of degree r then all vertices have degree r. Thus,

\sum_{i=1}^n r=2e\\nr=2e\\e=\frac{nr}{2}

4 0
2 years ago
For what values of m does the graph of y = 3x2 + 7x + m have two x-intercepts
Irina18 [472]

we are given

y=3x^2+7x+m

To find x-intercept means we have to find zeros

and for finding zeros , we will use quadratic formula

and we have it has two x-intercepts

so, it's discriminant must be greater than 0

so, we will find discriminant

D=\sqrt{b^2-4ac}

now, we can compare with

y=ax^2+bx+c

y=3x^2+7x+m

and then we can find a , b and c

a=3,b=7,c=m

now, we can find D

D=\sqrt{7^2-4*3*m}

D=\sqrt{49-12m}

It has two x-intercepts

so,

D=\sqrt{49-12m}>0

now, we can solve for m

49-12m>0

12m

m............Answer

8 0
3 years ago
Read 2 more answers
What is the answer to this
Murrr4er [49]

Answer:

I haven done that in a hot minute. jeezzz

Step-by-step explanation:

8 0
3 years ago
How does the value of 2 dimes compare to the value of2 dollars
Lyrx [107]
2 dimes = $0.20
2 dollars = $2.00

20 cents = 10% of 2 dollars
5 0
3 years ago
I need help please……..
Lemur [1.5K]

Answer:

A and D

explanation:

The other two answers looks like opinions

7 0
3 years ago
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