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777dan777 [17]
3 years ago
13

Please help!! 2y = -1 + 9 3х — бу : -15 M

Mathematics
1 answer:
nikklg [1K]3 years ago
8 0
• Rearrange first equation
x + 2y = 9

• Multiply the first equation by 3
3(x + 2y = 9)

• Rewrite equation 1
3x + 6y = 27

• Write both equations
3x + 6y = 27
3x - 6y = -15

• Subtract equation 1 from equation 2
3x + 6y = 27
-
3x - 6y = -15

• Write the reaming values
12y = 42

• Divide both side by 12 to solve for y
12y = 42 ➗ 12

• Write value of y
y = 3.5

• Substitute the value of y into one of the original equations
2(3.5) = -x + 9

• Use algebra and sole for x
7 = -x + 9
x = 9 - 7
x = 2

• Write final point
(3.5, 2)
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How many solutions does the system of linear equations have?
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6.2megagrams/hectoliter to kilograms/deciliter
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Answer:

6.2 kilograms/ deciliters

Step-by-step explanation:

megagrams to kilograms

1 megagram = 1000 kilograms

hectoliter to deciliter

1 hectoliter = 1000 deciliter

Using conversion factors

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---------------------- * ----------------------- * -------------------------

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Canceling like terms

6.2 kilograms/ deciliters

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vova2212 [387]

Answer:

x={-13,-2}

Step-by-step explanation:

(x+13)(x+2)=0

x+13=0

x=-13

x+2=0

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x={-13,-2}

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The domain of f(x) is all real numbers except 13.
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