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yaroslaw [1]
4 years ago
9

If the circumference of a circle is 18pi centimeters, what us the diameter of the circumference of the circle?

Mathematics
1 answer:
ziro4ka [17]4 years ago
4 0
Hello there! 

Now, the formula to find the circumference of a circle is C = 2\pir. Now, since the circumference is 18\pi, all we have to do is to divide 18 by 2 to find the <em>radius!</em>

The radius of the circle is 9 cm, since 18/2 = 9. However, this is the radius. We need the diameter.

Multiply 9 by 2 to find the diameter. 9 · 2 = 18. So the answer is B. 18 centimeters.

Hope this helped!
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Find the value of y, if the distance travelled<br> between the peints (2, y) and (-4, 3) is 10..
Rudiy27

Answer: y=11.

Step-by-step explanation:

(2;y_1)\ \ \ \ (-4;3)\ \ \ \ \ L=10\ \ \ \ \  y_1 > 0\ \ \ \ y_1=?\\The\  distance\  travelled\ between\  the\  peints:\\L=\sqrt{(x_2-x_1)^2+(y_2-y_1)}\\ 10=\sqrt{(-4-2)^2+(3-y_1)^2}\\ 10=\sqrt{(-6)^2+3^2-2*3*y_1+y_1^2}\\ 10=\sqrt{36+9-6y_1+y_1^2} \\10=\sqrt{45-6y_1+y_1^2}\\10*10= \sqrt{45-6y_1+y_1^2}*\sqrt{45-6y_1+y_1^2}\\100=45-6y_1+y^2_1\\

y^2-6y_1+45=100\\y_1^2-6y_1-55=0\\y^2_1-6y_1-5y+5y-55=0\\y^2_1-11y_1+5y_1-55=0\\y_1*(y_1-11)+5*(y_1-11)=0\\(y_1-11)*(y_1+5)=0\\y_1-11=0\\y_1=11.\\y_1+5=0\\y_1=-5\notin\ (y_1 > 0).

8 0
2 years ago
What fraction is represented by the portion of the figure that is NOT shaded? (2 out of 10 are shaded)
OverLord2011 [107]

Well let's see.

If the figure is split up into 10 pieces, then
each piece is  1/10  of the whole figure.

If  2  of the pieces are shaded, then
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How many pieces are left ?

There were 10 pieces all together, and
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jeyben [28]

Answer:

2 is your answer

Step-by-step explanation:

If h(x)= 5 then 5= 2x +1

so 5 = 2x + 1

   -1            -1 on both sides

then 2x = 4

        2      2 divide by 2

which x = 2

Hope my answer has helped you!

3 0
3 years ago
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