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Please help me solve these problems Determine whether the

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Please help me solve these...
Please help me solve these problems

Determine whether the equations are parallel,perpendicular or neither

1) 9x+3y=12
7y-31=21x

2) y=4x-3
12x+3y=7

AND

Graph this linear inequality
2x+y<_ 2
Submitted: 5 years ago.Category: Homework
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2/7/2012
Tutor: Sandhya, Tutor replied 5 years ago
Sandhya
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Determine whether the equations are parallel,perpendicular or neither

 

1)

 

9x+3y=12
7y-31=21x

 

Slope of line 9x + 3y = 12 is -3.
Slope of line 7y-31=21x is 3.

The slopes of lines are not equal and product of slopes is not -1 so lines are neither parallel nor perpendicular.

 

Answer: Neither

 

2)

 

y=4x-3
12x+3y=7

 

Slope of line y=4x-3 is 4.
Slope of line 12x+3y=7 is -4.

The slopes of lines are not equal and product of slopes is not -1 so lines are neither parallel nor perpendicular.

 

Answer: Neither

 

Graph this linear inequality
2x+y <= 2

 

graphic

 

Please don't forget to click ACCEPT. BONUS is always appreciated.

 

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Customer reply replied 5 years ago

Graph this linear equality should read less than or equal to not equal to. My error.

 

Also,can you help me with these problems:

 

Choose the ordered pair which is a solution of the inequality

 

1)2x+3y less than or equal to 0

 

2) 2x-4y less than or equal to 6

Tutor: Sandhya, Tutor replied 5 years ago
Hi

I have graphed the inequality 2x+y ≤ 2.

Do you have any options for next two questions?

Let me know.

Thanks
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Customer reply replied 5 years ago

For 1) I have (-1,1)

 

For 2) I have (3,-1)

Are these answers correct? These are the 2 last questions I asked for help with.

Tutor: Sandhya, Tutor replied 5 years ago
Choose the ordered pair which is a solution of the inequality

1)2x+3y less than or equal to 0

(-1,1)

2*(-1) + 3*1 = 1 which not less than 0

Answer: NO

2) 2x-4y less than or equal to 6

(3,-1)

2*3 -4(-1) = 10 which not less than 6

Answer: NO
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Customer reply replied 5 years ago
OK, SO WHAT IS THE CORRECT ANSWERS?
Tutor: Sandhya, Tutor replied 5 years ago
Hi,

Can you please send screenshot of the question?

You have given only one option for each inequality and these not solution.

Thanks
Ask Your Own Homework Question
Customer reply replied 5 years ago

1) Choose the ordered pair which is a solution of the inequality

2x+3y less than or equal to 0

 

(1,-1),(1,1),(-1,1)[1/2,1/3]

 

2) Choose the ordered pair which is a solution of the inequality

2x-4y less than or equal to 6

 

(3,1),(1,-1),(0,-2),(2,-2)

Tutor: Sandhya, Tutor replied 5 years ago
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