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Lyrx [107]
2 years ago
13

Find the value of n(A) if n(B) = 38, n(ANB) = 17, and n(AUB) = 59. n(A)- (Type a whole number.) W More More T V

Mathematics
1 answer:
victus00 [196]2 years ago
5 0

Answer:

n(A)=38

Step-by-step explanation:

In sets theory n(A) represents the number of elements in set A.This number is the cardinal number of the set A.

For n(AUB) there is an equation that relates n(A),n(B) and n(A∩B) :

n(AUB) = n(A) + n(B) - n(A∩B)

In our exercise :

n(AUB) = n(A) + n(B) - n(A∩B)

59 = n(A) +38-17\\n(A) = 59-38+17\\\\n(A)= 38

Another important equation for maths is similar to this one :

P(AUB) = P(A) + P(B) - P(A∩B)

Where ''P'' is the event probability.This equation is used in probability and statistics.

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if a smaller square of side 3 cm is cut out from a bigger square of side 9 cm to form a new shape ,What is the perimeter of the
Verdich [7]

Need to find:

  • Perimeter of new square formed?

~

Solution:

  • Side of smaller square = 3cm.
  • Side of Bigger square = 9cm

~

Using formula:

  • Perimeter of square = 4 × side

~

<u>Perimeter of smaller </u><u>square:</u>

⟹ 4 × 3

⟹ 12 cm

~

<u>Perimeter of Bigger square:</u>

⟹ 4 × 9

⟹ 36cm

~

Perimeter of new square = Perimeter of Bigger square - Perimeter of smaller square

⟹ 36 - 12

⟹ 24 cm

~

∴ Perimeter of new square formed is 24 cm.

8 0
2 years ago
Una recta con pendiente -2 ´pasa por el punto P(5, -1). La abscisa del punto Q que está en esa recta es 1. Encuentre la ordenada
oksian1 [2.3K]

Answer:

La ordenada de Q es 7.

Step-by-step explanation:

La ecuación de una recta es:

y = a*x + b

donde a es la pendiente y b es la ordenada al origen.

Para este problema, sabemos que la pendiente es -2

Entonces:

a = -2

y = -2*x + b

También sabemos que esta recta pasa por el punto (5, -1)

Esto significa que cuando evaluamos la ecuación en x = 5, y toma el valor y = -1

Si reemplazamos esos valores en la ecuación, obtenemos:

-1 = -2*5 + b

-1 = -10 + b

-1 + 10 = b

9 = b

Entonces la ecuación de la recta es:

y = -2*x + 9

Sabemos que el punto Q está en la línea, y la abscisa de este punto es 1.

Entonces este punto es Q (1, k)

donde k es la ordenada de este punto.

Porque nuestra línea también pasa por este punto, podemos concluir que cuando x = 1, y = k

Reemplazando eso en la ecuación tenemos:

k = -2*1 + 9 = -2 + 9 = 7

k = 7

La ordenada de Q es 7.

7 0
3 years ago
Angle Q measures 30 degrees. If angle Q is rotates 15 degrees, what is the measurement of angle Q?
wariber [46]
Angle Q will have the same measurement as it did before, 30°.
Just because the angle is rotated shouldn't change its angle measure.
3 0
3 years ago
Guyssssssss help me 10 points!!
zlopas [31]

Answer:

19

Step-by-step explanation:

the side is same as 57

what times 3 is 57?

57/3 is 19

AB is 19

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8 0
3 years ago
Cristina has completed .4 of his test. The test has 40 questions total. if he completes 12 more how many more will he have left?
bixtya [17]

24 because she already completed four and if she completes twelve more that that will be 24 hope that helps


5 0
3 years ago
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