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hodyreva [135]
4 years ago
8

Which pair of equations represents two perpendicular lines? answers shown in picture. ​

Mathematics
1 answer:
kolezko [41]4 years ago
3 0

Answer:

y =1/2x+6

y = -2x+2

Step-by-step explanation:

Perpendicular line have slopes that multiply to -1

The slopes are negative reciprocals

-4*4 = 16  not perpendicular

1/2 * -2 = -1  perpendicular

1/5 *5 = 1  not perpendicular

2/3 * 2/3 = 4/9  not perpendicular

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y=3x+5

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Step-by-step explanation:

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3 years ago
Give an example that shows why you need to reverse the sign when dividing or multiplying an inequality by a negative number.
AnnZ [28]

Answer:

2 < 3 ⇒ -2 > -3

Step-by-step explanation:

∵ 2 < 3

If we divide each side by -1

∴ -2 < -3 but it's not true

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∴ -2 > -3

similar:

∵ 25 > 20

If we divide each side by -5

∴ -5 > -4 it's not true

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6 0
3 years ago
DE=5x+6, AC=12x+8. What is the length of AC?
Katarina [22]

Answer:

AC = 32 units

Step-by-step explanation:

It looks like DE is half of AC, so to find the length of AC you would multiply the length of DE by 2.

DE = 5x + 6, so 2(5x + 6) = AC.

Distribute the 2 inside the parentheses.

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Now make this value equal to the expression standing for AC, 12x + 8.

  • 10x + 12 = 12x + 8

Subtract 10x from both sides of the equation.

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Subtract 8 from both sides of the equation.

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Take this value of x and substitute it into the expression for the length of AC.

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Multiply 12 and 2 together.

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Add 24 and 8.

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7 0
3 years ago
Read 2 more answers
Write a <img src="https://tex.z-dn.net/?f=y%3D%5Cfrac%7B4%7D%7B5%7Dx-2" id="TexFormula1" title="y=\frac{4}{5}x-2" alt="y=\frac{4
erastova [34]

Answer:

4x-5y=10

Step-by-step explanation:

3 0
3 years ago
How do you set this up?
PilotLPTM [1.2K]
B percent of something (x)
 means: b/100 * x

ex: (2)
20% of 120 = 20/100*120 = 24

ex: (4)
18 = 40 % of x
means: 40*x/100 = 18
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and so on


hope that helps

If you still need help, just let me know!

 
8 0
4 years ago
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