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.

   Ren solves -1 < 5 - x < 4 in a math notebook. What is the answer, written like 2 < x < 9 with the smaller number first?

   1 < x < 6
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 > 2
   • 2 < x < 5
   • No solution
   • x > 5
5. 5.

   Ari solves x < 4 or x < 9 with a pencil. Which answer is right?

   • 4 < x < 9
   • x < 4
   • All real numbers
   • x < 9
6. 6.

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

   • x ≤ -1
   • No solution
   • -6 ≤ x ≤ -1
   • x ≤ -6
7. 7.

   Jun solves 2x + 1 < 5 and 3x > 12 on paper. What is the answer?

   • No solution
   • All real numbers
   • x < 2
   • 2 < x < 4
8. 8.

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

   • 1 < x < 5
   • All real numbers
   • No solution
   • x < 5
9. 9.

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

   4
10. 10.

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

    6