Substitution Method

Substitution Method

100

2x+y=11 7x=14

x=2 y=7

200

-3x+2y=-5 3x=21

x=7 y=8

300

y=2x+4 -5x-5y=-5

x=-1 y=2

400

3x+2y=-15 2x=-18

x=-9 y=-7

500

x-5y=21 -6=24

x=-14 y=-5

Substitution Method

100

5x-7y=-2 x-4y=-3

x=1 y=1

200

2x+y=7 -2x-y=6

No Solution

300

8x+4y=-20 6x+6y=-18

x=-2 y=-1

400

-2x-4y=-16 6x-2y=20

x=4 y=2

500

6x-2y=-12 x-6y=-19

x=-1 y=3

Substitution Method

100

y=5x-7 -3x-2y=12

x=2 y=3

200

2x-3y=-1 y=x-1

x=4 y=3

300

y=-2 4x-3y=18

y=-2 x=3

400

y=6x-11 -2x-3y=7

x=2 y=1

500

x+2y=4      y=-1/2x+2

Infinite Solutions

Parallel and Perpendicular

100

x=5

Parallel slope?

slope=undefined

200

y=-7

Parallel Slope

slope=0

300

-3x+y=8

Parallel slope?

slope=3

400

y=-2x+5

Perpendicular Slope?

slope=1/2

500

x+3y=1

Perpendicular slope?

slope=3

Random Trivia

100

How many pounds of candy corn are produced each year?

a) 25 million pounds

b) 35 million pounds

c) 45 million pounds

d) 55 million pounds

b) 35 million pounds---amounting to 9 billion pieces

200

What is the most commercially successful horror movie of all time?

a) It

b) Halloween

c) Scream

d) Nightmare on Elm Street

a) It

300

How many bones does a shark have?

0

400

What is the only sport that has been played on the moon?

golf

500

Which state did the US purchase form Russia?

Alaska