Question

I have 3 questions that need answers A S A P

________________________________________________________________
How many solutions does this system have?

y=-3x
-9x - 4y

a. one
b. two
c. infinite
d. none
_____________________________________________________________________
How many solutions does this system have?

x+4y=6
y=2x-3

a. one
b. two
c. infinite
d. none
___________________________________________________________________
How many solutions does this system have?

12x-4y=-8
y=3x+2

a. one
b. two
c. infinite
d. none

Answer 1

12x-4y=-8
y=3x+2 can sub for y in the first equation: 12x - 4(3x+2) = -8

Then 12x - 12x - 8 = - 8

This is true for all x, so there are infinitely many sol'ns.