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Lady bird [3.3K]
2 years ago
8

Here is a venn diagram:

Mathematics
2 answers:
wel2 years ago
7 0

Answer:

a) (i) A∪B are 8, 9, 14, 15, 16, 17

(ii) A ∩ B are 14 and 17

b) The probability that a number chosen at random is in the set A' is 0.7

Step-by-step explanation:

a) (i) The numbers that are in the set A∪B are given as follows;

A∪B = {x: x ∈ A or x ∈ B}

A∪B is the set of all elements "x" such that "x" is a member of A or B

Therefore, A∪B = (8, 9, 14, 15, 16, 17)

(ii) A intersection B, written as , A∩B), is the set of elements belonging to both set A and set B

A∩B  = {x: x ∈ A and x ∈ B}

Therefore;

A ∩ B = 14 and 17

b) The set A' which is the complement of A are the elements in the universe which are not in A

The number of elements in the Venn diagram = 10 (numbers)

The number of elements in the set A' = 7

The probability that a number chosen at random is in the set A', P(A') is given as follows;

P(A') = (The number of elements in the set A')/(The number of elements in the Venn diagram)

∴ P(A') = 7/10 = 0.7

Vilka [71]2 years ago
4 0

Answer:

i)17,14,8,16,15

ii)14,8

The probability that the number is in set B,giving your answer as a decimal is 0.6.

i)is the numbers in A and B all of it even the numbers which are in both (middle circle)

ii)numbers in the middle circle.

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gogolik [260]

Answer:  Linear pairs of angles add up to 180 degrees. A+B=180

Step-by-step explanation: A linear pair of angles is formed when two lines intersect. Two angles are said to be linear if they are adjacent angles formed by two intersecting lines. The measure of a straight angle is 180 degrees, so a linear pair of angles must add up to 180 degrees

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3 years ago
Which angles are complementary<br> to &lt;2. Select all that apply.
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∠1 only

Step-by-step explanation:

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The only angle (that's an answer choice) that helps form a right angle with angle 2 is angle 1, thus making it the correct answer.

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daser333 [38]

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Find the area of a circle. use terms to pi. c=pi over 2. the answer is pi over 16. why?
FinnZ [79.3K]
C=2pi*r; circumference formula

a=pi*r^2; area formula

It says the circumference is pi/2; so undo that by using the circumference formula to solve for r(radius);

2pi*r=pi/2
pi crosses each other off, making 2r=1/2
(When something crosses itself out it becomes a 1)
2r=1/2
r=.25 (because 1/2 is 0.5, and 0.5 divided by 2 is .25)

Now use the r you have in the area formula.
a=pi*r^2
.25 squared is .0625

1 divided by .0625 is 16, so now you have
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(1/16th if pi is the same as pi divided by 16)

.0625pi=pi/16
5 0
2 years ago
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