Cramer's rule works as follows:
x+3y=16
3x+y=8
Then
x=Dx/D
y=Dy/D
where Dx,Dy,D are 2x2 matrices formed from of coefficients and right hand side.
D=
1 3
3 1
=1-9=-8
Dx=matrix D with first column replaced by the vector [16,8]=
16,3
8 1
=16-24
=-8
Dy=matrix D with second column replaced by the vector [16,8]=
1 16
3 8
=8-48
=-40
Therefore
x=-8/-8=1
y=--40/-8=5
Check:
x+3y=1+3(5)=16
3x+y=3(1)+5=8 ok.
Answer:
D: t = u/9 + 7 (that is simplified all of the way) for your case it is t = u + 63/9 so D
Explanation:
Just ask if you need an explanation. Also, does anyone do LD debate?
Answer:
<h2>
</h2>
Step-by-step explanation:
y = 4x + 3
To make x the subject send 3 to the other side of the equation
That's
4x = y - 3
<u>Divide both sides by 4 to make x stand alone</u>
We have the final answer as
Hope this helps you
B. The equation is 4x = -48. Ben’s point total is -12.
