Question

40 POINTS

Which system of equations below has infinitely many solutions?
y = –3x + 4 and y = –3x – 4
y = –3x + 4 and 3y = –9x + 12
y = –3x + 4 and y = -1/3x + 4
y = –3x + 4 and y = –6x + 8

Answer 1

Consider this option/explanaton:

only the system

\left \{ {{y=-3x+4} \atop {3y=-9x+12}} \right.

these two equations are dependent (if to multiply the 1st equation by 3 as result is the 2d equation).

Explanation:

Answer 2

Consider this option/explanaton:
only the system

`\left \{ {{y=-3x+4} \atop {3y=-9x+12}} \right.`
these two equations are dependent (if to multiply the 1st equation by 3 as result is the 2d equation).