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vovangra [49]
2 years ago
9

9.

Mathematics
1 answer:
notsponge [240]2 years ago
3 0

Answer:

B) x = 2, y = 3, z = 5

Step-by-step explanation:

3x −2y + 4z = 20

3(2) - 2(3) + 4(5) = 20

20 = 20

−x + 5y +12z = 73

-2 + 5(3) + 12(5) = 73

73 = 73

x + 3y −2z = 1

2 + 3(3) - 2(5) = 1

1 = 1

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lyudmila [28]
Notice that the 2 expressions have 2 common terms.

(r-s) is just (s-r) times (-1)

similarly

(t-s) is just (s-t) times (-1)

this means that :

(r-s) (t-s) + (s-r) (s-t)=-(s-r)[-(s-t)]+(s-r) (s-t)

the 2 minuses in the first multiplication cancel each other so we have:

-(s-r)[-(s-t)]+(s-r) (s-t)=(s-r) (s-t)+(s-r) (s-t)=2(s-r) (s-t)

Answer:

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3 0
3 years ago
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JulijaS [17]

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Step-by-step explanation:

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5 0
2 years ago
Describe the graph of the function y= square root of x-7+3
TiliK225 [7]

Answer:

Step-by-step explanation:

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3 years ago
On Monday, Jullo ran 39 miles. On Tuesday, he ran another
Artist 52 [7]
<h3>Answer:</h3>

67 miles

<h3>Step-by-step explanation:</h3>

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On Tuesday, he ran <u>24 miles.</u>

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On Wednesday, he ran <u>4 miles.</u>

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Total miles ran on Monday, Tuesday, and Wednesday = 39 + 24 + 4

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6 0
1 year ago
Is (–5, –1) a solution to the equation y = 5x?
Mamont248 [21]

Answer:

-1=5(-5)

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nope

Step-by-step explanation:

4 0
3 years ago
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