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Marizza181 [45]
3 years ago
7

Can you help me with this please

Mathematics
2 answers:
podryga [215]3 years ago
8 0
The equation to find a circumference is
(c = circumference, r = radius, d = diameter)
c = 2r · π
So we need to find the radius. 

A radius is half of the diameter, so
12/2 = 6

Now put the value in the equation and solve. 
c = 2 · 6 · π
c = 12 · π
c = 37.7

The answer is <span>37.7

</span>Hope this helped! If you have anymore questions or don't understand, please comment or DM me. :)
Vanyuwa [196]3 years ago
3 0
The answer would be 37.7
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Quadratic equations and complex numbers PLEASE HELPPPP ASAP
kondor19780726 [428]

we are given

27x^3-1=0

we can also write it as

(3x)^3-(1)^3=0

now, we can use factor formula

a^3-b^3=(a-b)(a^2+ab+b^2)

we can use above formula

we get  

(3x)^3-(1)^3=(3x-1)((3x)^2+3x\times 1+(1)^2)

now, we can simplify it

27x^3-1=(3x-1)(9x^2+3x+1)

now, we can set it to 0

27x^3-1=(3x-1)(9x^2+3x+1)=0

and then we can solve for x

(3x-1)(9x^2+3x+1)=0

3x-1=0

x=\frac{1}{3}

9x^2+3x+1=0

now, we can use quadratic formula

x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

now, we can plug values

and we get

x=\frac{-3\pm \sqrt{3^2-4\cdot \:9\cdot \:1}}{2\cdot \:9}

x=-\frac{1}{6}+i\frac{\sqrt{3}}{6},\:x=-\frac{1}{6}-i\frac{\sqrt{3}}{6}

So, we will get solution as

x=\frac{1}{3},\:x=-\frac{1}{6}+i\frac{\sqrt{3}}{6},\:x=-\frac{1}{6}-i\frac{\sqrt{3}}{6}...............Answer

5 0
3 years ago
Please help me with these questions.
Debora [2.8K]
4. k less than 3.5, so a number k is being taken away from 3.5:
The answer is 3.5-k

5. the sum of g and h, reduced by 11, so you need a set of parentheses to write this one: (g+h)-11

6. 5 less than y, plus g, so do a combination of the strategies used in the previous two problems and you will get: (y-5)+g

7. 5 less than the sum of y and g, you are taking away 5 from the sum of two numbers, y and g, so: (y+g)-5

Hope this helps :-)
5 0
3 years ago
What is equation is equivalent to 7x/4 - 3x/8= 11?
kotykmax [81]

Answer:

x = 8

Step-by-step explanation:

\frac{7x}{4}  -  \frac{3x}{8} = 11 \\  \\  \frac{56x - 12x}{32}  = 11 \\  \\ 44x = 352 \\  \\ x =  \frac{352}{44}  \\  \\ x = 8

4 0
4 years ago
Record letters from left to right
Lady bird [3.3K]

Answer:

Step-by-step explanation:

ok so im not really sure what this is asking, but im thinking its  EBFACGDHI but im not positive

5 0
3 years ago
Read 2 more answers
Miguel Rodriguez borrow $400 from his brother Julio to pay the books and tuition. he agreed to pay Julio in six months with simp
asambeis [7]
  • <em>1st Divide $400 into 6.9% your answer is 27.6</em>
3 0
3 years ago
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