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Vikentia [17]
2 years ago
5

PLEASE PLEASE PLEASE HELP! I WILL GIVE BRAINLIEST

Mathematics
1 answer:
MAVERICK [17]2 years ago
4 0
Diameter of the circle =4+4=8
Area of semicircle =8 pi
Area of triangle= 1/2*4*8=16
Area of the shaded area=8pi -16=2.9 pi approximately 3pi
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Is a relation always a function? Is a function always a relation? Explain.
katen-ka-za [31]

A function is always a relation but relation is not always a function

<u>Solution:</u>

Given that, we have to explain Is a relation always a function and is a function always a relation

Note that both functions and relations are defined as sets of lists.  

In fact, every function is a relation. However, not every relation is a function.  A relation from a set X to a set Y is called a function if each element of X is related to exactly one element in Y.

That is, given an element x in X, there is only one element in Y that x is related to.

For example, consider the following sets X and Y. Let me give you a relation between them that is not a function;

X = { 1, 2, 3 }

Y = { a , b , c, d }

Relation from X to Y : { (1,a) , (2, b) , (2, c) , (3, d) }

This relation is not a function from X to Y because the element 2 in X is related to two different elements, b and c

Relation from X to Y that is a function: { (1,d) , (2,d) , (3, a) }

This is a function since each element from X is related to only one element in Y. Note that it is okay for two different elements in X to be related to the same element in Y. It's still a function, it's just not a one-to-one function.

So, we can say that function is a type of relation.

Which means whatever a function occurs, it will be a relation from one set to other.

But when a relation occurs it may be a function but need not be always a function.

Hence, a function is always a relation but relation is not always a function.

8 0
3 years ago
Simplify: −7 + {12 − 3[50 − 4(2 + 3) ] }
DedPeter [7]

Answer:

-85

Step-by-step explanation:

<em><u>1) (2 + 3)</u></em>

-7 + {12 - 3[50 - 4(5) ] }

<em><u>2) -7 + {12 - 3[50 - 20] }</u></em>

-7 + {12 - 3[30] }

<em><u>3) -7 + 12 - 90</u></em>

5 - 90

<u>Answer: -85</u>

6 0
3 years ago
A ferris wheel
Elena L [17]

Answer:

12375

Step-by-step explanation:

one rotation: 495

25 rotations x 495 seconds

12375  seconds

5 0
3 years ago
Read 2 more answers
The Jensen family took a trip in September. Sally is calculating the gas mileage in miles per gallon for her dads SUV. When he f
Fynjy0 [20]
U don't have enough information to answer the question because u need to know how much the gas is per gallon
3 0
3 years ago
2. Determine whether each event is impossible,
Gre4nikov [31]

Answer:

likely is the awnser

Step-by-step explanation:

likely is the awnser

3 0
3 years ago
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