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PilotLPTM [1.2K]
3 years ago
6

Which set is more variable? How do you know?

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
5 0
Excuse me, but do you mean valuable...?
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Pleasee help x.x 1. Solve the system by elimination-
patriot [66]
Q1. The answer is x = 1, y = 1, z = 0

<span>(i) -2x+2y+3z=0
</span><span>(ii) -2x-y+z=-3 
</span>(iii) <span>2x+3y+3z=5
</span><span>_________
Sum up the first and the third equation:
</span>(i) -2x+2y+3z=0
(iii) 2x+3y+3z=5
_________
5y + 6z = 5

Sum up the second and the third equation:
(ii) -2x-y+z=-3 
(iii) 2x+3y+3z=5
_________
2y + 4z = 2


(iv) 5y + 6z = 5
(v) 2y + 4z = 2
________
Divide the fifth equation by 2
(iv) 5y + 6z = 5
(v) y + 2z = 1
________
Multiple the second equation by -3 and sum the equation
(iv) 5y + 6z = 5
(v) -3y - 6z = -3
________
2y = 2
y = 2/2 = 1


y + 2z = 1
1 + 2z = 1
2z = 1 - 1
2z = 0
z = 0


-2x-y+z=-3
-2x - 1 + 0 = -3
-2x = -3 + 1
-2x = -2
x = -2/-2 = 1



Q2. The answer is x = -37, y = -84, z = -35

<span>(i) x-y-z=-8 
(ii) -4x+4y+5z=7 
(iii) 2x+2z=4
______
</span>Divide the third equation by 2 and rewrite z in the term of x:
(iii) x+z=2
z = 2 - x
______
Substitute z from the third equation and express y in the term of x:
<span>x-y-(2-x)=-8 
x - y - 2 + x = 8
2x - y = 10
y = 2x - 10
______
Substitute z from the third equation and y from the first equation into the second equation:
</span><span>-4x + 4y + 5z = 7 
-4x + 4(2x - 10) + 5(2 - x) = 7
-4x + 8x - 40 + 10 - 5x = 7
-x -30 = 7
-x = 30 + 7
x = -37
y = 2x - 10 = 2*(-37) - 10 = -74 - 10 = -84
z = 2 - x = 2 - 37 = -35</span>
8 0
3 years ago
Hi can anybody tell me the answer
VladimirAG [237]
The answer would be 2x^7
5 0
3 years ago
Read 2 more answers
A farmer has 4 horses, 3 pigs and 7 cows.Whatis the probability of randomly selection a pig?
shutvik [7]

Answer:

3/14 or 21.428571428571%

Step-by-step explanation:

First you should add all of the animals together.

3 + 4 + 7 = 14

3 out of 14 animals are pigs.

5 0
3 years ago
Read 2 more answers
HELP RIGHT NOW AND ILL GIVE BRAINLY IF CORRECT
Stella [2.4K]

Answer:

-9

Step-by-step explanation:

3^{-36}= 27^{-12}

7 0
3 years ago
The diagram below shows a triangle with base (x+5) and height 2x inside a shaded rectangle with length (3x+1) and width (3x-5).
Ilya [14]

Answer:

3 for the first one 2ed one is 5

Step-by-step explanation:

6 0
2 years ago
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