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Ymorist [56]
3 years ago
5

3.)

Mathematics
1 answer:
mars1129 [50]3 years ago
7 0

9514 1404 393

Answer:

  (x, y, z) = (8, -5, 9)

Step-by-step explanation:

A suitable calculator or app can solve linear systems larger than 2 equations in 2 unknowns. The attachment shows the solution to be ...

  (x, y, z) = (8, -5, 9)

__

The third equation is conveniently solved for z, which can then be substituted into the other two equations to get two equations in two variables. These can be solved in any of the usual ways.

  z = 6 +x + y

The first equation becomes ...

  10x -y -9(6 +x +y) = 4   ⇒   x -10y = 58

  -4x +y +4(6 +x +y) = -1   ⇒   5y = -25

The latter gives you y = -5. Putting that in the former gives x = 8. Then the value of z is ...

  z = 6 +(8) +(-6) = 9

So, the solution is (x, y, z) = (8, -5, 9).

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Most linear systems you will encounter will have exactly one solution. However, it is possible that there are no solutions, or infinitely many. (It is not possible that there are exactly two solutions.) The word unique in this context means there is a solution, and it's the only one.

Hope this helps.
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ABCD is a trapezoid. Point E is the midpoint of AD and point F is the midpoint of B.
VikaD [51]
2 cm. because you would subtract 5 and 3.
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3 years ago
Which of the following represents the area of a rectangle whose length is 3x + 5 and whose width is x − 2? 3x2 − x − 10 3x2 − 10
never [62]
A = L * W
L = 3x + 5
W = x - 2

A = (3x + 5)(x - 2)
A = 3x(x - 2) + 5(x - 2)
A = 3x^2 - 6x + 5x - 10
A = 3x^2 - x - 10 <====

5 0
3 years ago
Read 2 more answers
What is 7 8/13 rounded to the nearest whole number?
vfiekz [6]

Answer: The answer would be 8.

Step-by-step explanation: I'm going to assume you mean 7 8/13 is a mixed fraction. So you multiply the denominator, 13, multiply 7 to that, then add 8 to it and the denominator would be the same as before. That should give you 99/13. When you divide, you get around 7.6, rounding closest to 8.  

6 0
3 years ago
Sue has sourced four wholesalers from where she will buy most of her stock, including arrangements with two suppliers for 30 day
Westkost [7]

The difference between the total number of wholesalers and those that supply on 30-day credit, gives the number that require cash on delivery as 2

<h3>How can the question be analyzed to find the required number of wholesalers?</h3>

The number of wholesalers Sue has sourced = 4

Terms of two suppliers = 30 days credit

Amount of stock Sue has = $15000

Amount of stock on credit = $10000

Operating cash reserve of the business = $20000

Required:

The number of wholesalers that require terms of cash on delivery

Solution:

Given that the number of wholesalers = 4

The number number of suppliers (wholesalers) that supply on 30-day credit = 2

Therefore;

The number of wholesalers that require terms of cash on delivery = 4 - 2 = 2

Learn more about word problems here:

brainly.com/question/1781657

#SPJ1

8 0
2 years ago
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