Chapter 4 Alg A

Substitution

100

y=-x-7

5y+3x=-13

x=-11

y=4

200

y=3x

2y-5x=4

x=4

y=12

300

x-4=y

-5y+8x=29

x=3

y=-1

400

2x+2y=18

x=3-y

No solution

Bonus points(lines are parallel)

500

c=-b-11

3c+6=6b

b=-3

c=-8

Equal values

100

y=-2x+5

y=x-1

x=2

y=1

200

x=-5y+2

x=3y-2

x=-.5

y=.5

300

y=-.5x+7

y=x-8

x=10

y=2

400

y=.5x+4

y=-2x+9

x=2

y=5

500

2(3+5x)=y

y=6+5x

x=0

y=6

Elimination

100

2x+3y=15

x-3y=3

x=6

y=1

200

3x+y=1

4x+y=2

x=1

y=-2

300

-6x+2y=76

3x-y=-38

All solutions

400

5x+3y=-6

2x-9y=18

x=0

y=-2

500

6x+2y=7

4x+y=4

x=1/2

y=2

Random

100

First soda in outer space.

Coca-Cola

200

True or false.

You can drive south in central Detroit and enter Canada

True

300

How many colors will you find in a regular bag of M&Ms?

6

400

When was Wi-Fi first introduced to the public?

1997

500

When was the cellphone invented?

1973