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madreJ [45]
3 years ago
10

In a certain country the probability that a baby that is born is a boy is 0.52 and the probably that a baby that is born is a gi

rl is 0.48. A family has two children. If X is the number of girls born to a family, find the probability that the family has 0,1 or 2 girls
Mathematics
1 answer:
Luden [163]3 years ago
4 0

Answer:

0.7504

Step-by-step explanation:

0 Girls = 0.52 x 0.52 = 0.2704

1 Girl = 0.52 x 0.48 = 0.2496

2 Girls = 0.48 x 0.48 = 0.2304

0.2704 + 0.2496 + 0.2304 = 0.7504

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Two factors of 30 add up to 9. What are they?
Komok [63]
<span>factors of 30 are numbers by which 30 is divisible.
if we list out 30 as a product of factors 30 = 1 x 30
30 = 2 x 15
30 = 3 x 10
30 = 5 x 6
therefore all the factors of 30 are - 1,2,3,5,6,10,15,30
the numbers 3 and 6 add up to 9.
therefore the 2 factors that add up to 9 are 3 and 6</span>
5 0
4 years ago
Rewrite in simplest terms: 5(-4p-8p+3)-7p
Novosadov [1.4K]

Answer:

-67p + 15

Step-by-step explanation:

Hello!

Expand the parenthesis and simplify by combining like terms.

<h3>Simplify</h3>
  • 5(-4p-8p+3)-7p
  • -20p - 40p + 15 - 7p
  • -67p + 15

The simplified form is -67p + 15.

4 0
2 years ago
8.3+7.2b-3.6b =???<br><br><br> If anyone can just find the answer to this real quick
Vanyuwa [196]

Answer:

if you are simplify its 3.6b+8.3

Step-by-step explanation:

8.3+(7.2b-3.6b) : Group like terms together

8.3+3.6b : Combine each group

3.6b+8.3 : Rearrange the expression

4 0
3 years ago
Find the area of each regular polygon below. Round values to the nearest 0.01. Show work for all steps clearly.
german

The area of the hexagon and pentagon area 779.4cm^2 and 84.303cm^2 respectively.

Data;

  • apothem = 15

<h3>Area of a Hexagon</h3>

The area of a hexagon with apothem 15 can be calculated by first finding the length of the side of the hexagon.

Length of hexagon can be found using trigonometric ratio;

a = x\sqrt{3}

Making x the subject of formula

x = \frac{a}{\sqrt{3} }\\x = \frac{15}{\sqrt{3} }\\x = 8.660

And then the length of the side is 2x

s = 2 * 8660 = 17.32

The perimeter of the hexagon is;

p = 6s \\p = 6 * 17.32=103.92

And the area is given as

A = \frac{1}{2} * perimeter * apothem\\A = \frac{1}{2} * 103.92 * 15\\A = 779.4unit^2

The area of the hexagon is 779.4 squared unit.

<h3>Area of the pentagon</h3>

The area of the pentagon can be found using several methods, but we can simply find the angle between the sides if we divide the pentagon into 10 pieces and then substitute the formula.

Total area of a pentagon is 360 degree.

\theta = \frac{360}{10} = 36^0\\

The area of a pentagon is given as

A = \frac{5s^2}{4 tan \theta} \\A = \frac{5 * 7^2}{4* tan36} \\A = 84.303cm^2

The area of the pentagon is 84.303cm^2

From the calculations above, the area of the hexagon and pentagon area 779.4cm^2 and 84.303cm^2 respectively

Learn more on area of polygons here;

brainly.com/question/1592439

4 0
3 years ago
Mark leaves his house at 12:53
barxatty [35]

Answer: His house is 43.33334 kilometers

4 0
3 years ago
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