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alisha [4.7K]
2 years ago
14

Need help with this!!

Mathematics
1 answer:
Tcecarenko [31]2 years ago
6 0

Answer:

{ 1,3,4,6,7}

Step-by-step explanation:

Do B∩C first

This is B intersect C which  means what they have in common

B∩C = {3,6,7}

Then A∪(B∩C)

A union   {3,6,7} which means join together ( combine with no duplicates) the two sets

{ 1,3,4,6,7}

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Plz help im rlly struggling with this
den301095 [7]
you forgot the question to ask lol
4 0
2 years ago
A biologist measured the lengths of hundreds of cuckoo bird eggs. Use the relative frequency distribution below to answer the qu
storchak [24]

Using the frequency table, it is found that:

a) 99.2% of the group of eggs were less than 24.75 mm long.

b) 0.471 = 47.1% probability that one of the eggs selected at random was at least 21.75 mm long but less than 24.75 mm long.

The frequency table gives the percentage of cuckoo bird eggs with the associated lengths.

  • For example, 0.8% of eggs have lengths between 18.75 and 19.75 millimetres.

Item a:

  • 0.8% of eggs were more than 24.75 mm.

Thus, 100 - 0.8 = 99.2% were less than 24.75 mm long.

Item b:

  • 37.9% between 21.75 and 22.75 mm.
  • 28.5% between 22.75 and 23.75 mm.
  • 10.7% between 23.75 and 24.75 mm.

In total:

37.9 + 28.5 + 10.7 = 47.1

47.1% of the eggs are in these lengths, thus, 0.471 = 47.1% probability that one of the eggs selected at random was at least 21.75 mm long but less than 24.75 mm long.

A similar problem is given at brainly.com/question/24141790

4 0
2 years ago
6/2(1+2)=? Can someone help pretty please
barxatty [35]
First evaluate the value in the parenthesis: (1+2)=3
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so the final answer is 9
4 0
3 years ago
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A hiker begins at sea level and descends 25 feet every minute. How long will it take to get to an elevation of -750 feet?
horsena [70]

Answer:

it would take about 7 1/2 minutes.

Step-by-step explanation:

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4 0
2 years ago
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Consider the system of linear equations and the matrix equations below.
gregori [183]

9514 1404 393

Answer:

  x = 7

Step-by-step explanation:

Using Cramer's rule, the value of x is ...

  x=\dfrac{\left|\begin{array}{cc}2&3\\22&-2\end{array}\right|}{\left|\begin{array}{cc}-1&3\\4&-2\end{array}\right|}

  x = ((2)(-2) -(22)(3))/((-1)(-2) -(4)(3)) = (-4-66)/(2-12) = -70/-10

  x = 7

4 0
2 years ago
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