Can someone help me out with this? I’m not sure what I’m doing wrong.

Which graph best represents the solution to this system of inequalities?
2x + 3y (> with line underneath) 2
3x - 4y (< with like underneath) 3

Respuesta :

Answer:


Step-by-step explanation:

This is a system of inequalities such that:

[tex]\left \{ {{2x+3y\geq 2} \atop {3x-4y\leq 3}} \right.[/tex]

Let's start by solving for y for both equations:

Equation 1:

[tex]2x+3y\geq  2\\\\3y\geq -2x+2\\\\y \geq \frac{-2x+2}{3}[/tex]

Equation 2:

[tex]3x-4y\leq 3\\\\-4y\leq -3x+3\\\\y\geq -\frac{(-3x+3)}{4}[/tex]


Now if we substitute the 2nd y into the first equation we obtain:

[tex]2x+3(\frac{3x-3}{4}) \geq  2\\\\2x+\frac{9x-9}{4}\geq 2\\\\\frac{8x+9x-9}{4}\geq 2\\\\17x-9\geq 8\\\\17x\geq 17\\\\x\geq 1[/tex]


Now we will solve for the second equation using the first result of y and we obtain:

[tex]3x-4(\frac{-2x+2}{3}\leq 3\\\\3x+\frac{8x-8}{3}\leq 3\\\\\frac{9x+8x-8}{3}\leq 3\\\\17x-8\leq 9\\\\17x\leq 17\\\\x\leq 1[/tex]

And so our solution for the system of equations is:

[tex]x \leq 1\\and \\y\geq \frac{-2x+2}{3}[/tex]

As well as:

[tex]x>1\\and\\y\geq \frac{3x-3}{4}[/tex]