PLEASE HELP, WILL MARK BRAINLIEST! - Which system of equations below has exactly one solution?
A. y = –8x – 6 and y = –8x + 6
B. y = –8x – 6 and 1/2y = –4x – 3
C. y = –8x – 6 and y = 8x – 6
D. y = –8x – 6 and –y = 8x + 6
A The two equations are parallel. They have the same slope. You get two lines that never meet. The y intercept is -6 for the first one and + 6 for the second one.
B Mutliply the second equation by 2 2(1/2y = -4x - 3) y = -8x - 6 The two equations do not differ at all. There are an infinite number of solutions.
C The slopes are different. One is plus 8 and the other is minus 8. These two equations will meet at exactly 1 point.
D If you multiply the whole equation by - 1 you get the same thing as the first set of equations. -1(-y = 8x +6) y = -8x - 6