Review Algebraic Expressions Equations Inequalities

Look at the model. Which of the following algebraic expressions could it represent?

• 9x

• 3x + 8

• -2 + 2 - x + 4

• -2 + 2x - x + 4

Solve the equation. Check your solution.

• 80

• 45

• 180

• 5

Pick the correct inequality.

• A

• B

• C

• D

-4x + 14 ≤ 54

• x ≥ -10

• x ≤ -10

• x ≥ 10

• x ≤ 10

What inequality does the number line graph represent?

• -x + 4 ≥ -1

• -2x + 3 > -7

• -x + 1 < -4

• 2x + 3 ≥ 13

(6x + 3y + 4) + (x + y – 5)

• 5x + 2y + 9

• 7x + 2y + 9

• 7x + 4y + 9

• 7x + 4y -1

Lea needs at least $240 to buy new headphones. She has already saved $30. She earns $14 per car that she washes. What is the least number of cars she can wash to buy the headphones? Write the inequality to the problem.

• 14x+30 ≥ 240

• 14x+30 ≤ 240

• 30x+14 ≥ 240

• 30x+14 ≤ 240

The phrase: “the product of 4 and x” represents which algebraic expression?

• 4 ÷ x

• 4x

• 4 + x

• 4 - x

What inequality does this number line show?

• n > 5

• n < 5

• 5 ≤ n

• 5 ≥ n