The answer would be D.
you would start by choosing one of the variables to eliminate, i chose to eliminate X first. in order to eliminate X, i had to multiply the second equation by -2. X then cancelled out, and i solved for the Y the same way you would a 1 step equation. Y=-4
I then took the first original equations, plugged Y in, and solved for X. X=3.
Hope this helps!
Answer:
y=28
Step-by-step explanation:
6x-y=2
-y=2-6x
y=6x-2
4x-(6x-2)=-8
4x-6x+2=-8
-2x=-10
x=5
y=6*5-2=30-2=28
y=28
Answer:
x=2,x=-2,x=0
Step-by-step explanation:
Answer:
c^2=9+1
Step-by-step explanation:
c^2=a^2+b^2
c^2=3^2+1^2
c^2=9+1
Z = ax / y
A = 2
X = 28
Y = 14
Plug it into the formula then solve for Z.
Z = ax / y
Z = 2(28) / 14
Z = 56 / 14
Z = 4
Therefore, she should buy 4 boxes.