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unit 3
100

4(2+6)-1

31

100

y=1/3x+2

y=-x-2

(-3,1)

100

√30

√30

200

3^2+6(x-1)

3+6x

200

y=4

2x-4y=8

(12,4)

200

3√24

6√6

300

-2x-5y=15

y=-2/5x-3

300

2x-2y=8

-2x+5y=-5

(10,3)

300

-√32

-4√2

400

-x+y=13

y=x+13

400

-2x-y=-9

4x+2y=18

infinite

400

√72

6√2

500

3x-9y=27

-y=1/3x+3

500

y=2x-5

3x-4y=12

no

500

√60

2√15