In week 12 we did a lesson on solving Quadratoc systems of equations. Just by looking at the graph we can tell how many solution it will have.

In order to solve quadratic systems of equations you need to use substitution.

Ex:

x-2y=-10

3x-y=0

isolate one of the variables

3x=y

 

put 3x into y

x-2(3x)=-10

x-6x=-10

-5x=-10

x=2

put ^ (x=2) back into the equation to find y

2-2y=-10

-2y=-12

y=6

answer: (2,6)