Unit 4 Inequalities, Expressions, and Equations

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

The answer to this inequality 5 − 2t < -4 is t > 9/2

Why does the inequality change from the less than symbol to the greater than symbol.

• I will divide by a negative 2.

• I will multiply by a negative 2.

• I will add negative 2.

• I don't know; I am negative.

2 + 3x ≤ 20

• x ≤ 6

• x ≥ -6

• x ≤ 7

• x ≥ -7

x - 20 ) > 2

• x > 40

• x < 40

• x > 220

2x > 12

• x > 6

• x < 6

• x ≥ 6

• x ≤ 6

Simplify the following expression:
19 - ( 3 - 5b)

• 16 + 5b

• 21 + 5b

• 16 - 5b

• 21 - 5b

Simplify the expression:
6 + 2(7x - 3) 

• 12 + 7x

• 14x

• 14x + 3

• 9 + 7x

Which of the following is equivalent to the expression shown?(7.EE.A.1) 2(1 − x) + 3x

• 2 + x

• 2 + 2x

• 2 + 4x

• 2 + 5x