1. is the following system consistent or inconsistent? 8x + y + 4 = 0 y = -8x - 4 2. is the following system consistent or inconsistent? 7x + 6 = -2y -14x -4y + 2 = 0 3. is the following system consistent or inconsistent? -2x - 2y = 6 10x + 10y = -30 4. is the following system consistent or inconsistent? 2y = x - 7 -2x - 6y = -14 5. is the following system consistent or inconsistent? y = 2x + 5 -2x + y = -2

Answer with Explanation:

If a consistent system has an infinite number of solutions, it is dependent . When you graph the equations, both equations represent the same line.

If a system has no solution, it is said to be inconsistent . Represent parallel lines.

1)   8x + y + 4 = 0  

       y = -8x - 4

If we solve equation 8x + y + 4 = 0  for y, we get

y = -8x -4

So, both equations are same. That means both lines are same. So infinite many solutions.

System is consistent

2) Both line slope are same and parallel to each other.

So,  no solution

System is  inconsistent.

3) Both equation represent the same line. So, infinite many solution.

System is consistent.

4)  Both lines are intersect at a point.

Intersection point is (7,0).

5) Both lines are parallel. So, no solution.

System is inconsistent.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.