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Katarina [22]
3 years ago
11

Conditional probabilities

Mathematics
1 answer:
Svet_ta [14]3 years ago
3 0

Answer:

D) Of the 4 people who have a sister, 1 of them also has  a brother.

Step-by-step explanation:

P(B/A) indicates the probability of event B when event A has alredy occured.

Event A = The person has a sister.

Event B = The person has a brother.

So now P(B/A) means the probability of the person having sister who already have brother.

Hence choice "D) Of the 4 people who have a sister, 1 of them also has  a brother." is correct.


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Alex has a grid in the shape of a rectangle. He has right triangles. Each right triangle has an area of 25 square millimeters an
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First I would convert 20 and 12 to millimeters which would be 20= 200mm 12= 120mm. You would then find the area if the grid which would be 200•120=
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X^2+y^2-16x-161=0 factor it
Jlenok [28]

(x-8)^2+y^2=225 I'm not able to factor it

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The engineers designing the All Aboard Railroad between Boca Raton and Jupiter decide to create parallel tracks through this por
Misha Larkins [42]

there are no signs between the x and y and constant

it could be

2x+5y=15

2x+5y=-15

-2x+5y=15

2x-5y=15


for ax+by=c, the equation of a line paralell to that is

ax+by=d where a=a, b=b, and c and d are constants


(for this answer, I'm going to use 2x+5y=15)

given 2x+5y=15, the equation of a line paralell to that is 2x+5y=d

to find d, subsitute the point (4,-2), basically put 4 in for x and -2 for y to get the constant

2x+5y=d

2(4)+5(-2)=d

8-10=d

-2=d

the eqaution is 2x+5y=-2 (Only if the original equation is 2x+5y=-15

5 0
3 years ago
Does the function y=x have an inverse? If so does it pass the horizontal line test?
egoroff_w [7]

Yes, y=x has an inverse.

Yes, y=x passes the horizontal line test.

If it didn't pass the horizontal line test, it would not have an inverse.

4 0
1 year ago
Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
Bezzdna [24]

Based on the calculations, the solutions of this system of linear inequalities are equal to:

  1. y < 4x + 5
  2. y ≤ 2x + 3

<h3>What is an inequality?</h3>

An inequality simply refers to a mathematical relation that's used to compare two (2) or more integers (variables) in an equation based on any of the following:

  • Greater than (>).
  • Less than (<).
  • Greater than or equal to (≥).
  • Less than or equal to (≤).

In order to determine the solutions of this system of linear inequalities, we would find the slope of each line.

For line A, we have:

Slope, m = (11 - 3)/(4 - 0) = 8/4

Slope, m = 2.

Mathematically, the standard equation of a line is given by y = mx + b.

y = 2x + 3

y ≤ 2x + 3.

For line B, the slope is equal to 4. Also, the y-intercept from the graph is equal to 5.

Therefore, the standard equation of a line is given by:

y = 4x + 5

y < 4x + 5

In conclusion, the solutions of this system of linear inequalities are equal to:

  1. y < 4x + 5
  2. y ≤ 2x + 3

Read more on linear inequalities here: brainly.com/question/21103162

#SPJ1

6 0
2 years ago
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