Inequalities
Graphing Inequalities
Systems of Equations
Elimination
Substitution
100

True/False?

3<8

True

100

On a number line, which way do the negative numbers go?

Down if on the y axis and to the left if on the x axis.

100

What is a system of equations?

2 or more equations with the same variables.

100

Solve the system by elimination.

x+y=10

x-y=4

(7,3)

100

Solve by substitution.

y=2x

2x+y=12

(3,6)

200

Solve

6x+2+6x<14

x<1

200

An open circle on the number line tells you that the endpoint (number) is _________________.

Not included.

200

What are the 3 ways to solve systems of equations?

Graphing, substitution, and elimination.

200

Solve by elimination.

x+y=6

-x+y=-4

(5,1)

200

Solve by substitution.

x=2y+1

x+3y=16

(7,3)

300

When do you need to reverse of switch the direction of the inequality symbol?

1. When you multiply or divide by a negative number.

2. When you solve the inequality and the variable comes out on the right side of the inequality. Flip the entire answer.

300

A closed circle tells you the endpoint or number is __________ and that the number is an answer of the solution set.

Included

300

When graphing systems of equations, the equations need to be in _______________________ form or ______________.

Slope-intercept form or y=mx+b

300

Solve by elimination.

2x-3y=9

x+3y=0

(3,-1)

300

Substitution.

x=2y

4x+y=18

(4,2)

400

Solve.

2(x-3)>10

2x-6>10

add 6 to both sides

2x>16

divide by 2 on both sides

x>8

400

When graphing an inequality, what do you graph first?

The y-intercept or the "b".

400

Graph this system of equations and write the solution down in ordered pair format.

x-y=6

2x+y=3

(3,-3)

400

Solve by elimination.

3x=5-7y

2y=x-6

(4,-1)

400

Substitution.

y=3x+2

2x-3y=8

(-2,-4)

500

True/False

7>3 and 2>10

False

500

What is the y-intercept and the slope of this inequality?

2x+y>1

y>-2x+1

m=-2 or -2/1

b=1

500

Solve by graphing and write answer as an ordered pair.

y=-3+2

y=2x-3

(1,-1)

500

Solve by elimination.

2x+3y=15

x-3y=3

(6,1)

500

Substitution.

4y+31=3x

y+10=3x

(1,-7)

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