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3 years ago

Solve this system of equations

Mathematics

1 answer:

olga_2 [115]3 years ago

8 0

Answer:

D) x = 4, y = -2, z = 3

Step-by-step explanation:

x = 3z − 5

2x + 2z = y + 16

2(3z - 5) + 2z = y + 16

6z - 10 + 2z = y + 16

8z = y + 26 ---> (A)

7x − 5z = 3y + 19

7(3z - 5) - 5z = 3y + 19

21z - 35 - 5z = 3y + 19

16z = 3y + 54 ---> (B)

8z = y + 26

16z = 3y + 54

2(y + 26) = 3y + 54

2y + 52 = 3y + 54

y = -2

8z = -2 + 26

8z = 24

z = 3

x = 3(3) - 5

x = 4

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3 years ago

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Anna11 [10]

Answer:

4y = x - 17

Step-by-step explanation:

First off, in the equation given : 2x + 5y = 6 , make y the subject of the formula which will give y = $\frac{-2x}{5}$ + $\frac{6}{5}$ which make the gradient, m, the coefficient of x = $\frac{-2}{5}$ . Since the line we're looking for is parallel to the one we were given, their respective gradients would be the same. (If they were perpendicular, the gradient of the new line would be a negative inverse of the given line)

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2 years ago

Use the associative property to write am expression equivalent to (n+3) +4

lisabon 2012 [21]

D is the correct answer.

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2 years ago

If 2x – 7y = 10 is a true equation, what would be the value of 2 + 2x – 7y?

lara31 [8.8K]

Answer:

I believe that would be 12 because

Step-by-step explanation:

if 2x - 7y = 10

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2 years ago

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zubka84 [21]

Answer:

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Step-by-step explanation:

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3 years ago