grade 7 math

Which of these represents commutative property of union of sets?

• C ∩ B = B ∪ A

• A ∩ B = B ∩ A

• A ∪ B = B ∪ A

  How is the complement of a set A determined?

•    A – B

• U/A

• A ∪ B

Which of these is not a subset of rational numbers?

• Natural number

• Irrational number 

• Whole number

  The square root of 1.7 X 34 X 0.8 is

• 6.8

• 0.68

• 68

   The square root of 2.25 is

• 15

• 0.15

• 1.5

    The square root of 144 is

• 12

• 13

• 14

Take away 2x² – 10 from x² + y². The result is:

• x²+y²–10

• 3x²+y² –10

• –x²+y²+10

  Take away 2x² – 10 from x² + y². The result is:

• x²+y²–10

• 3x²+y² –10

• –x²+y²+10

What type of angles is formed by two perpendicular lines?

• 180º

• 360

• 90

  An algebraic expression with three terms is called a?

• Monomial

• binomial

• Trinomial