If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation.
8x - y = -9
4x - 3y = -22

Question

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation.
8x - y = -9 
4x - 3y = -22

anonymous · Answer

A. 4(-8x-9)-3y=-22
B. 4x-3(-8x-9)=-22
C. 4(8x+9)-3y=-22
D. 4x-3(8x+9)=-22

anonymous · Answer

I am completely confuzzled. I have no idea how or what to do... :/

lucaz · Answer

first solve the 1st equation for y
y=9+8x

lucaz · Answer

the plug in the second equation 4x-3(8x+9)=-22

anonymous · Answer

Thank you sooo much! I have been trying this forever and got no where. I filled up an entire page working on this problem. Somehow, I wasn't able to get it on my own. It seems fairly simple. This is the beginning of my second semester of Algebra 2 and it has been a while since I completed semester1..

lucaz · Answer

=] algebra is always simple

anonymous · Answer

I wish it was for me :P Help on another question? Its a word problem. I suck at those

lucaz · Answer

what is it?

anonymous · Answer

Two competing cable companies have recently restructured their payment plans. Clear TV requires a $30 activation fee and charges $75 per month for their basic plan. Link TV requires no activation fee and charges $82.50 per month for their basic plan. When will the two plans be equal in cost?

A.They will not ever be equal
B.At 2 months
C.At 5 months
D.At 4 months

lucaz · Answer

Clear: 30+75(m)
Link 0+82.5(m)
set Clear = Link and solve for m
30+75m=82.5m
m=4 months

anonymous · Answer

You're the best!