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Sergeu [11.5K]
4 years ago
7

What relation is a function? - plz help -

Mathematics
1 answer:
Eduardwww [97]4 years ago
7 0

Answer:

Step-by-step explanation:

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. ... This is a function since each element from X is related to only one element in Y.

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How to solve this please? <br><br> 2x - 5 = 4
Nutka1998 [239]
Hey there, below you will find the work and answer to your question.

2x-5=4

First lets get the 2x by itself so we have to add 5 on both sides.
2x-5=4
   +5 +5
2x=9
Now we need to get the X by itself so divide each side by 2
\frac{2x}{2} =  \frac{9}{2}
Now we are left with the following
X=\frac{9}{2}
We must simplfy the fraction
2 will go into 9 four times with 1 left over. So the mixed fraction answer would be:
x=4 \frac{1}{2}
As a decimal you would just divide 9 and 2
x=4.5

Hope this helped!



3 0
4 years ago
Read 2 more answers
X2+9x+8 <br> factor each trinomial
Lana71 [14]

Answer:

(x+1)(x+8)

Step-by-step explanation:

x^2+9x+8

You just need to multiply the first number to the last. (a·c) In this case *a* is jus a positive 1. Then, you just find a product to the result you got from (a·c) that when it is added together the result is the same as the one you have as ¨b¨.

Also the sign betwee b and c tells you that if it is positive both of your products are going to have the same sign, and if it is negative it means that they are going to be different,(one negative and one positive). If the sign is positive then go to the sign between a and b, this tells you what sign your factors will have.

<h2>x^2+9x+8</h2>

a·c=8

<u>Product           Sum</u>

1,8                      8

2,4                     6

ect...                 ect...

x^2+x+8x+8

x(x+1) 8(x+1)

 (x+1)(x+8)

<u />

3 0
3 years ago
What is 28% of 70? Also, 0.9% of 54? Thank you in advance!
Dmitry_Shevchenko [17]

19.6 and 0.486

hope this helps

8 0
3 years ago
Steve went the the baseball game with some of his friends. He bought 3 packages of peanuts and 4 hotdogs for a total of $14.50.
Tasya [4]
$32.50

each package of peanuts = $2.50
each hotdog = $1.75
7 0
3 years ago
3x+5y= 10?<br><br> A. y =⅗ x+ 10 <br> B. y = 3x− 2 <br> C. y =- ⅗ x +15<br> D. y = − 5/3 x - 8
Andrews [41]
It a or c take a guess
8 0
3 years ago
Read 2 more answers
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