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denis-greek [22]
3 years ago
8

PLEASE HELP ASAP 25 PTS + BRAINLIEST FOR BEST/RIGHT ANSWER

Mathematics
1 answer:
Airida [17]3 years ago
7 0

Answer:

(-2,-1,-3)

Step-by-step explanation:

5x-4y-3z=3

x+y-z=0

x=3y+1

Multiply the second equation by -3

-3(x+y-z)=0*3

-3x-3y+3z =0

Add this to the first equation to eliminate z

5x-4y-3z=3

-3x-3y+3z =0

--------------------

2x-7y =3

Substitute x =3y+1 into the above equation

2(3y+1) -7y=3

Distribute the 2

6y +2 -7y = 3

Combine like terms

-y+2 =3

Subtract 2 from each side

-y+2-2 = 3-2

-y = 1

Multiply by -1

-y*-1 = 1*-1

y =-1

We need to find x

x=3y+1

x =3(-1) +1

x =-3+1

x=   -2

Now we need to find z

x+y-z=0

-2+-1-z=0

-3-z=0

Add z to each side

-3-z+z=0+z

-3=z

x=-2, y=-1 z=-3

(-2,-1,-3)

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3 years ago
A manager is comparing the cost of buying ball caps with the team emblem from two different companies. Company X charges a $50 f
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Answer:

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Step-by-step explanation:

In this question, we are trying to know the number of caps the manger would buy that would equate the cost at both companies.

How do we get this?

Since we do not know the number of caps, let’s assign a variable. Let the number of caps that is required be x. Let’s now make some costings in terms of x. We proceed;

Company X charges $50 fee plus $7 per cap. Total amount company X will charge on x caps will be; $50 + $7(x) = $50 + $7x

Company Y will charge $30 plus $9 per cap. Total amount company Y will charge on x caps will be $30 + $9(x) = $30 + $9x

We are trying to look at the value of x that will make both costs equal. What we do is to equate both costs.

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We simply by taking like terms to the same sides

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3 0
3 years ago
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Dmitrij [34]

Answer:

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Step-by-step explanation:

For a relation to be regarded as a function, there should be no two y-values assigned to an x-value. However, two different x-values can have the same y-values.

In the relation given in the equation, the ordered pairs (1,4) and (1,3), prevent the relation from being a function because, two y-values were assigned to the same x-value. x = 1, is having y = 4, and 3 respectively.

Therefore, the relation is not a function anymore if both ordered pairs are included.

<em>The ordered pairs which make the relation not to be a function are: "(1, 4) and (1,3), because they have the same x-value".</em>

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