anonymous
  • anonymous
Two lines, A and B, are represented by equations given below: Line A: y = x – 4 Line B: y = 3x + 4 Which of the following shows the solution to the system of equations and explains why? A. (–3, –5), because the point satisfies one of the equations B. (–3, –5), because the point lies between the two axes C. (–4, –8), because the point satisfies both equations D. (–4, –8), because the point does not lie on any axis
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
You want the value of y and x?
anonymous
  • anonymous
yes
anonymous
  • anonymous
Line A : y = x - 4 - eqn1 Line B : y = 3x + 4 - eqn2 Plug eqn 1 in eqn 2 x - 4 = 3x + 4 So far , good?

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anonymous
  • anonymous
yup
anonymous
  • anonymous
then how do i know witch one is the answer?
anonymous
  • anonymous
x - 4 = 3x + 4 x - 3x = 4 + 4 -2x = 8 x =8/-2 x = -4
anonymous
  • anonymous
Plug x = -4 in either eqn 1 or eqn 2 y = x - 4 y = -4 - 4 y = -8
anonymous
  • anonymous
because the point satisfies both equations?
anonymous
  • anonymous
or
anonymous
  • anonymous
because the point does not lie on any axis?
Loser66
  • Loser66
hey, why do you need more help? you got (-4,-8) and there is ONLY one option looks like this. What is next?? PICK IT. dat sit
anonymous
  • anonymous
but i don't know wich on it is: because the point does not lie on any axis? or because the point satisfies both equations?
Vocaloid
  • Vocaloid
a solution to a system of equations is a point that satisfies both equations
Loser66
  • Loser66
YES, LIKE wshat Vocaloid said

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