Given the equation 3x - 4y = 8, which equation below would cause a consistent-dependent system?

3x + 4y = -8

6x - 8y = 12

9x - 12y = 24

16x + 12y = -10

Respuesta :

3x - 4y = 8

y = mx + b ; m is the slope ; b is the y-intercept

-4y = -3x + 8
y = -3x/-4 + 8/-4
y = 3/4 x - 2

Need to check if the given choices have the same slope.

3x + 4y = -8
4y = -3x - 8
y = -3/4 x - 8/4 = -3/4 x - 2

6x - 8y = 12
-8y = -6x  + 12
y = -6/-8 x + 12/-8
y = 3/4 x - 1 1/2

9x - 12y = 24   This equation would cause a consistent-dependent system
-12y = -9x + 24
y = -9/-12 x + 24/-12
y = 3/4 x - 2  

16x + 12y = -10
12y = -16x - 10
y = -16/12 x - 10/12
y = -1 1/3 x - 5/6

For a system of the equation to be a Dependent Consistent System, the system must have multiple solutions. The correct option is C.

What is the System of equations?

Inconsistent System

For a system of equations to have no real solution, the lines of the equations must be parallel to each other.

Consistent System

1. Dependent Consistent System

For a system of the equation to be a Dependent Consistent System, the system must have multiple solutions for which the lines of the equation must be coinciding.

2. Independent Consistent System

For a system of the equation to be an Independent Consistent System, the system must have one unique solution for which the lines of the equation must intersect at a particular.

For a system of equations to be consistent-dependent system, the line of the equations must coincide, therefore, the equation must be in ratio. Thus, for the other equation, the equation 3x-4y=8 needs to be multiplied by 3 on both sides of the equation. Therefore,

3(3x - 4y) = 3(8)

9x - 12y = 24

Hence, the correct option is C.

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