Hi! So i posted a question yesterday and I worked on but before i submit my answer do you think you can check my answers?

1. 7x+3y= pi 4x-6y= pi^2
2. 2x+3y= 0 4x+6y= 0 2
3. x+3y=1 4x+ 6y= 1
4. x+y=5 x+2y=10
5. 2x-3y=5 4x-6y=10

1.U 2.N 3.N 4.U 5.I

If it is a follow-up question, it is better for you to post the question in the original post, and make a new post to refer to the original post (giving the date and time suffices).

See answer at the end of previous post:
http://www.jiskha.com/display.cgi?id=1252636277
on Thursday, September 10, 2009 at 10:31pm.

Sure, I can help you check your answers. Let's go through each problem one by one:

1. For the first question:
Equation 1: 7x + 3y = π
Equation 2: 4x - 6y = π^2

Let's solve this system of equations:
Multiply Equation 1 by 2: 14x + 6y = 2π
Multiply Equation 2 by 7: 28x - 42y = 7π^2

Add the two equations together:
(14x + 6y) + (28x - 42y) = 2π + 7π^2
Combine like terms:
42x - 36y = 2π + 7π^2

Since the left side (42x - 36y) does not simplify to x or y only, this means the answer is inconsistent. So, your answer "U" for this question is correct.

2. For the second question:
Equation 1: 2x + 3y = 0
Equation 2: 4x + 6y = 0

Let's solve this system of equations:
Equation 1 multiplied by 2: 4x + 6y = 0
Equation 2 remains the same: 4x + 6y = 0

Both equations are the same, which means they represent the same line. Therefore, the answer is infinite. Your answer "N" for this question is incorrect.

3. For the third question:
Equation 1: x + 3y = 1
Equation 2: 4x + 6y = 1

Let's solve this system of equations:
Multiply Equation 1 by 4: 4x + 12y = 4
Equation 2 remains the same: 4x + 6y = 1

Both equations have different coefficients for the same variables. Therefore, the lines represented by these equations are parallel and do not intersect. Hence, the answer is inconsistent. Your answer "N" for this question is correct.

4. For the fourth question:
Equation 1: x + y = 5
Equation 2: x + 2y = 10

Let's solve this system of equations:
Subtract Equation 1 from Equation 2:
(x + 2y) - (x + y) = 10 - 5
Simplify:
x + 2y - x - y = 5
Combine like terms:
y = 5

Now substitute this value of y back into either Equation 1 or Equation 2 to solve for x:
Using Equation 1: x + 5 = 5
Subtract 5 from both sides:
x = 0

The solution to this system is x = 0, y = 5. Therefore, your answer "U" for this question is incorrect.

5. For the fifth question:
Equation 1: 2x - 3y = 5
Equation 2: 4x - 6y = 10

Let's solve this system of equations:
Multiply Equation 1 by 2: 4x - 6y = 10
Equation 2 remains the same: 4x - 6y = 10

Both equations are the same, which means they represent the same line. Therefore, the answer is infinite. Your answer "I" for this question is correct.

To summarize your answers:
1. Correct answer: U
2. Incorrect answer: N
3. Correct answer: N
4. Incorrect answer: U
5. Correct answer: I

I hope this helps in reviewing your answers!