Unit 7 Review

What is the opposite of 2.5?

What is the absolute value of 2.5?

• 2.5

• -2.5

• 0

• 1.5

What is the opposite of -17?

• 17

• -34

• -17

• 0

What is the absolute value of -17?

• 17

• -17

• 0

• -1

These four numbers are plotted on a number line: -2/3, 5/8, -3/5, -1/2. Which is the correct ordering on the number line, from left to right?

• -1/2, -3/5, -2/3, 5/8

• -2/3, -3/5, -1/2, 5/8

• -1/2, -3/5, 5/8, -2/3

• -3/5, -2/3, -1/2, 5/8

Which of the following numbers are solutions to the inequality x < -2? Select ALL that apply.

• -50

• -3

• -2.2

• 2

• 1

Which of the following number lines correctly represents the solutions to x > -3?

• A number line with an open circle at -3 and shading to the right.

• A number line with a closed circle at -3 and shading to the right.

• A number line with an open circle at -3 and shading to the left.

• A number line with a closed circle at -3 and shading to the left.

Write an inequality to represent the hanger diagram shown here. Use c to represent the weight of a circle, p to represent the weight of a pentagon, and s to represent the weight of a square.

• s+ p > c

• c + p = s

• s + p < c

• sp < c

If the weight of the pentagon is 10 ounces, which of the following inequalities is true?

• c > 10 +p

• s+ p = 10

• c + s ≥ 10

• c ≤ s + 10

Diego’s dog weighs more than 10 kilograms and less than 15 kilograms. Select all the inequalities that must be true if w is the weight of Diego’s dog in kilograms.

• w > 11

• w < 10

• w < 11

• w < 15

• w > 10