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Levart [38]
3 years ago
15

What is the circumference of a circle with a diameter of 2 feet? Use 3.14 for

Mathematics
2 answers:
fredd [130]3 years ago
4 0
It will be B. The formula for finding the circumference of a circle is pi x diameter. So it would be 3.14 x 2. And when you calculate it you get 6.28.
babymother [125]3 years ago
4 0
The awnser is B. 6.28 ft
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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
Sarah adds 3 to it then doubles it and gets an answer of 52.4 what was the original number.​
dem82 [27]
52.4/2= 26.2
26.2-3= 23.2
So the original number = 23.2
4 0
3 years ago
find the value of c that makes each trinomial a perfect square. then write the trinomial as a perfect square. the equation , x^2
mr Goodwill [35]
Therefore, the value of C should be (11/2)^2

<span>To square a fraction, take the square of the numerator and put it over the square of the denominator. So since 11^2=121 and 2^2=4, (11/2)^2
(11)^2/(2)^2=121/4
</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
3 0
3 years ago
One minute is 1/60 of an hour. What part of an hour is 12 minutes?
Alla [95]
2/10ths of an hour. You do 12/60 and get 0.2
7 0
3 years ago
Read 2 more answers
7(n+4) ....................
Juli2301 [7.4K]

Answer:

<h2>7n + 28</h2>

Step-by-step explanation:

7(n + 4)

Expand

7 \times n = 7n \\ 7 \times 4 = 28 \\  \\ 7n + 28

4 0
3 years ago
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