Compound inequalities: "and" and "or"

Answer Key - Grade 9 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Noah solves -6 < -3x ≤ 9 on paper. What is the answer, written like 2 < x < 9 with the smaller number first?

   -3 ≤ x < 2
2. 2.

   Pia solves 4 ≤ -2x + 2 < 10 with a pencil. What is the answer, written like 2 < x < 9 with the smaller number first?

   -4 < x ≤ -1
3. 3.

   Tala solves -8 ≤ -4x < 12 on paper. What is the answer, written like 2 < x < 9 with the smaller number first?

   -3 < x ≤ 2
4. 4.

   Zee solves x > 2 and x > 5 on paper. Which answer is right?

   • x > 5
   • 2 < x < 5
   • x > 2
   • No solution
5. 5.

   Bo solves x ≤ -1 and x ≤ -6 in a math notebook. Which answer is right?

   • x ≤ -6
   • -6 ≤ x ≤ -1
   • No solution
   • x ≤ -1
6. 6.

   Luz solves 3x - 2 ≥ 7 and x + 5 ≤ 6 in a math notebook. What is the answer?

   • All real numbers
   • x ≥ 3
   • 1 ≤ x ≤ 3
   • No solution
7. 7.

   Milo solves 2x < 10 or x + 3 > 4 on paper. What is the answer?

   • x < 5
   • All real numbers
   • No solution
   • 1 < x < 5
8. 8.

   Noah wonders how many integers make 3 < 2x + 1 < 13 true on paper. How many are there?

   4
9. 9.

   Pia wonders how many integers make -5 ≤ 3x + 1 ≤ 10 true with a pencil. How many are there?

   6
10. 10.

    Tala wonders how many integers make -4 ≤ 3x + 2 ≤ 14 true on paper. How many are there?

    7