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Studentka2010 [4]
3 years ago
9

Find the exact circumference of a circle with the given radius.

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
3 0

Answer:

6.5\pi\ in

Step-by-step explanation:

we know that

The circumference of a circle is equal to

C=2\pi r

we have

r=3\frac{1}{4}\ in

Convert to an improper fraction

r=3\frac{1}{4}=\frac{3*4+1}{4}=\frac{13}{4}\ in

substitute

C=2\pi(\frac{13}{4})

C=\frac{13}{2}\pi=6.5\pi\ in

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I can't figure out the second answer please help!!!
Mekhanik [1.2K]

Choice A is one of the answers. Nice work. This is because x+x+x turns into 3x.

Choice D is the other answer because 2(x+1) + x = 2x+2+x = 3x+2. You can find this through trial and error. Or you could graph y = x+x+x+2 and y = 2(x+1)+2 to find that they are the same exact identical diagonal line. A non-graph approach would be to set up a table of values to see that the two tables are identical.

3 0
3 years ago
Read 2 more answers
A stove costs $695 will be on sale next week for 20% off its regular price. What is the amount of savings
jonny [76]

Answer:

It would be 139$

Step-by-step explanation:

In order to find a percent of a value you first move the decimal place over 2 to the left or divide by 100(percentage is no longer there). In this case it would be .20. You multiply that with the total number(695) and the product is your answer.

3 0
3 years ago
Having trouble with add or subtracting the given polynomials
Bumek [7]

7.

(2b^2+7b^2+b)+(2b^2-4b-12)

(9b^2+b)+(2b^2-4b-12)

9b^2+b+2b^2-4b-12

11b^2+b-4b-12

11b^2-3b-12

8.

(7g^3+4g-1)+(2g^2-6g+2)

7g^3+4g-1+2g^2-6g+2

7g^3-2g-1+2g^2+2

7g^3-2g+1+2g^2

7g^3+2g^2-2g+1

Hope this helps!

3 0
3 years ago
Read 2 more answers
{1/8, -0.02555,0.2,-1/7} following set up numbers from least to greatest by the way there are two negatives
nata0808 [166]

Change each of the fractions into decimals.

1/8 becomes 0.125

-1/7 becomes -0.143

and -0.02555

0.2

In order from least to greatest,

-0.143, -0.02555, 0.125, 0.2

OR

-1/7, -0.02555, 1/8 and 0.2

6 0
4 years ago
Hello, I need help with this question.
ella [17]

Answer:

The answer would be 22/12 or 1 and 11/12

Step-by-step explanation:

1/2+2/3+3/4

First get common denominators so you have a denominator of 12 so 6/12+8/12+9/12

Add those together and you get 23/12 but you have to subtract one because that's what the problem says so you get 22/12

4 0
3 years ago
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