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3 years ago

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Solve by the linear combination method (with or without multiplication) 2x+3y= -17, 5x+2y = -4

2 answers:

Amiraneli [1.4K]3 years ago

6 0

2x+3y= -17
5x+2y= -4
You must cancel either the x or y out to solve so i'm going to cancel the x.
-5(2x+3y= -17)
2(5x+2y= -4)
This simplifies to:
-15x -15y=85
15x+4y= -8
The -15x and 15x cancel out leaving you:
-15y=85
4y= -8
You add them top numbers by the bottom and get:
-11y=77
Then divide by -11 to get y by its self.
y= -7
Now that you know what y is just plug it in to either original problem. I will use the second one.
5x + 2(-7) = -4
5x -14 = -4
5x = 10
x = 2
So the answer is (2,-7) or x=2 and y=-7

lions [1.4K]3 years ago

6 0

Answer: (2,-7) or x=2 and y=-7

Step-by-step explanation: Took the test and can confirm this is the answer!

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3 years ago

Read 2 more answers

Provide the reflected ordered pair for each of the given ordered pairs. Reflect the ordered pair ( − 4 , 5 ) (-4, 5) across the

levacccp [35]

Answer:

a) (4,5)

b) (0,-3)

Step-by-step explanation:

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a) Reflect the ordered pair (-4,5) across the y-axis

Reflection over y-axis:

$r: (x,y)\rightarrow (-x,y)$

Thus, (-4,5) will be reflected over y-axis as

$r: (-4,5)\rightarrow (-(-4),5) = (4.5)$

b) Reflect the ordered pair (0,3) across the y-axis

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3 years ago

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sveta [45]

Answer:

x=2

Step-by-step explanation:

Simplify both sides of the equation.

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(Distribute the Negative Sign)

2x−1 + −1(−x + 3)=6−2x

2x + −1 + −1(−x) + (−1)(3)=6−2x

2x + −1 + x + −3=6−2x

2x + −1 + x + −3=6 + −2x

(Combine Like Terms)

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Add 2x to both sides.

3x−4 + 2x=−2x + 6 + 2x

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Add 4 to both sides.

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2 years ago