Friday, May 17, 2013

Day 3                                        Mckenzie N.      Mackenzie H.
Daily objective-students will be able to solve system of equations by addition/subtraction
http://www.youtube.com/watch?v=nTF6Kp_icFo
Quiz-
1.x-2y=14
x+3y=9

2.-x-3y=-1
x+4y=3

3.x-4y=18
x+3y=4

Answer key
1.x-2y=14                                         x-2(-1)=14
-(x+3y=9)                                          x+2=14
-5y=5 -2 -2
-5=5y                                                  x=12
y=-1

2.-x-3y=-1                                         x+4(2)=3
+(x+4y=3)                                           x+8=3
y=2                                  -8 -8
                                                                      x=-5

3.x-4y=18                                    x-4(-2)=18
-(x-3y=4)                                       x+8=18
7y=-14 -8 -8
y=-2                             x=10

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