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BlackZzzverrR [31]
3 years ago
12

Sam's taking a pen from his case. He has 1 black ,2 purple ,4 blue, and 3 red pens. If he chooses one without looking, what's th

e probability that he'll choose a blue one
Mathematics
1 answer:
Mrrafil [7]3 years ago
4 0
Probablity=desiredoutcomes/totalpossibleoutcomes
total possible outcomes=1+2+4+3=10
desired outcomes=4 blue


probablity=4/10=2/5=40%
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Determine the equation of the circle with centre (-3;5) and passing through a point (2;-9)
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Therefore, the equation of circle is: (x+3)^{2}+(y+5)^{2} = 100

<h3><u>What is a circle?</u></h3>
  • All points in a plane that are at a specific distance from a specific point, the center, form a circle. In other words, it is the curve that a moving point in a plane draws to keep its distance from a specific point constant.
  • The radius of a circle is the separation between any point on the circle and its center.
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Here we know that(h,k) = (-3,5)but we are not given the radius.

However, we can find the radius by using the distance formula.

\sqrt{x^{2} +y^{2} }, where x=x_{1} -x_{2} and y=y_{1} -y_{2}

Putting the values, we get:

\sqrt{8^{2} +6^{2} }

The radius comes out to be:

r=10

An equation of the circle with center (h,k) and radius r is

(x-h)^{2} +(y-k)^{2} = r^{2}

Now, substituting the values, we get:

(x--3)^{2} +(y-5)^{2} = 10^{2}

Therefore, the equation of circle is:

(x+3)^{2}+(y+5)^{2} = 100

Know more about circles with the help of the given link:

brainly.com/question/10618691

#SPJ4

7 0
1 year ago
The Hawks are starting a babysitting business. They charge an initial deposit of $20
Ede4ka [16]

Answer:

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Step-by-step explanation: So first you have to make this word problem into a equation into standard form so 20 is our (y) because that is the additional charge but our slope is 3 because that is what they charge per hr **when they say (per) usually the member with it is the slope** (sry I’m not the best explainer)

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3 years ago
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Which set shows an average of 8?<br> A) A<br> B) B<br> C) A and B<br> D) none of the above
nasty-shy [4]

Answer: D

Step-by-step explanation:

None of the above

8 0
2 years ago
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14% increase of 43200
Tomtit [17]
43,200 is 100%, plus 14%. You are looking for 114% of 43,200.

To find this, simply multiply 43,200*1.14, which equals 49,248.
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