Question

Which system has infinitely many solutions?
a) 2x+y=7
4x-2y=14
b) 3x-y=2
x-3y=-2
c) x+y=3
x+y=4
d) 2x+y=5
4x+2y=10

Answer 1

d because they are the same

Answer 2

i will help u out let me help u

Answer 3

r u still there

Answer 4

yeah the last one has linear dependency

Answer 5

E1 2x+y = 5
E2 4x+2y = 10

If you notice, equation two is just equation 1 multiplied by 2 so essentially they are the same.