How many solutions does this system of equations have?

y = –3x + 7
y = –3x – 6

(Points : 1)
infinitely many
2
1
0

Question

How many solutions does this system of equations have?

y = –3x + 7
y = –3x – 6

(Points : 1)
       infinitely many
       2
       1
       0

jdoe0001 · Answer

$\bf y = {\color{red}{ –3}}x + 7\
y = {\color{red}{ -3}}x – 6$

what do you think?

anonymous · Answer

no solution right so 0

anonymous · Answer

@kelliegirl33

jdoe0001 · Answer

well... ahemm.... why?

anonymous · Answer

a negative and a negative would make it no solution i assume

jdoe0001 · Answer

ahemm.... well

same-slope functions, means their graph is parallel lines
parallel lines never touch, thus since they never touch, there's no solution

since a solution is where their graph cross

anonymous · Answer

No solutions.  The lines are parallel.
In problems like this, solve each for y and then compare the coefficient of x, the line's slope.