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uysha [10]
3 years ago
7

Which of the following points lies on the circle whose center is at the origin and whose radius is 10?

Mathematics
1 answer:
Naddik [55]3 years ago
6 0
Since the standard form of the circle is:

(x-h)^2+(y-k)^2=r^2, and (h,k)=(0,0) and r=10 so we have:

x^2+y^2=100   Looking at the points you have:

(√10, 0) does not work as (√10)^2+0^2=10+0=10

(0, 2√5) does not work as 0^2+(2√5)^2=0+20=20

(5√2, 5√2) works as (5√2)^2+(5√2)^2=50+50=100
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3 years ago
What type of number is -2i?
Iteru [2.4K]

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Step-by-step explanation:

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2 years ago
Evaluate the following function when x = -1 and x = 2 and determine the sum of the two results:
ElenaW [278]

Answer:

J. 1

Step-by-step explanation:

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7 0
1 year ago
I can't figure this out!
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3 0
2 years ago
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The price of a sweater was reduced from $20 to $12.By what percentage was the price of the sweater reduced?
Katen [24]

The price of the sweater was reduced by 40%

Step-by-step explanation:

Step 1; Cost before reduction was $20. The cost after reduction was 12$. Cost reduced= cost before reduction - cost after reduction

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Step 2; We must find how much of the cost was reduced from the initial cost i.e. how much $8 is to $20. To do this we must convert it into a percentage. We divide the $8 with the $20 to get a value. This value must be multiplied with a 100 to be converted into a percentage.

Cost by which sweater was reduced=  \frac{8}{20}* 100 = 0.4 * 100 = 40

So the price of the sweater was reduced from $20 to $8 which equates to a reduction in 40%.

3 0
3 years ago
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