Find the value of x. The figure shows a quadrilateral with the left and right sides marked as parallel and the top and bottom marked congruent. The bottom left interior angle is labeled 5x degrees and the bottom right interior angle is labeled 4x degrees.
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A. x = 5
B. x = 10
C. x = 20
D. x = 40

Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit