Expressions, Equations and Inequalities in Unit Six

Which number line shows all the values of x that makes the inequality true?

• a

• b

• c

• d

Solve for t.

6t + 4 ≤ -2

• t ≤ -1 

• t ≤ 1

• t=1

• 1=t

Lin got a $50 gift card to an online music store. She uses the gift card to buy an album for $9.99. She also wants to use the gift card to buy some songs. Each song costs $1.29. Which of these inequalities describes this situation, where n is the number of songs Lin wants to buy?

• 9.99+1.29n≥50

• 9.99+1.29n≤50

• 9.99−1.29n≥50

• 9.99−1.29n≤50

Select all expressions that are equivalent to 6x+1−(3x−1)

• 6x+1−3x−1

• 6x+-3x+1+1

• 3x+2

• 6x−3x+1−1

• 6x+1+-3x−-1

2x > 12

• x > 6

• x < 6

• x ≥ 6

• x ≤ 6

Is this an expression, equation, or inequality?
-5x + 9 ≤ 2 + x

• Expression

• Equation

• Inequality

2 + 3x ≤ 20

• x ≤ 6

• x ≥ -6

• x ≤ 7

• x ≥ -7

"Twenty-four minus three times an integer, x, is less than x minus four."

Write an inequality, in terms of x, to represent this information.

Mathematical Equivalence

OFF

Mathematical Equivalence

ON

Match the following

• no equal sign or inequality symbol

• Expression

• has an inequaltiy symbol

• Equation

• Has an equal sign

• System of Inequalties

• Double shaded region

• System of Equations

• more than one line

• inequality