Posted by robbie on Saturday, January 29, 2011 at 9:15pm.
7X - 9Y = 63
-7X + 9Y = -63
m1 = -A/B = -7 / -9 = 7/9.
m2 = 7/9.
m1 = m2 = 7/9.
Threfore, the lines are parallel and
has no solution. Solve the Eqs and
you'll get 0 = 0.
Put it in another way, the lines are coincident and parallel, so they are consistent and we have an infinite number of solutions (at every point where the two lines overlap).
Given:
7X-9Y=63
Let t be any real number equal to X, then
X=t
Y=(7t-63)/9
where -∞<t<∞
So if we multiply the 2nd Eq by -1, we'll notice that the 2 Eqs are exactly identicak.
Thanks!
Related Questions
Algebra - Find the missing coordinate to complate the ordered-pair solution to ...
Mat 116 - substitution method 7x +9y= 19 x=25-5y ___________ 7(25-5y)+9=19 175-...
Math - Could someone please explain this problem to me. I need to factor and ...
math - I am supposed to figure out if these are consistent or inconsistant ,but ...
Algebra - Ok I got two I need help with : 1. Factor Completely 7x^2 + 49x + 42 I...
Algebra - Solve the system of equations by graphing. Then clasify the the system...
math help & correction - Problem #1 Is this correct or wrong? Find the slope...
Algebra 116 - I need help with these algebra problems please. 1.Solve by using ...
alegbra - 7x+9y-9(7x-8y+5z)= help me I do not know what to do.
math - Can someone please help me with this, -x/y = 2/9 I do not understand how ...
For Further Reading
