Question

question 16 not yet answered marked out of 1.00 flag question which statement is false? select one: a. all real numbers are complex numbers. b. all irrational numbers are real numbers. c. all complex numbers are pure imaginary numbers. d. all whole numbers are rational numbers. question 17 not yet answered marked out of 1.00 flag question which statement illustrates the associative property of addition? select one: a. ((1 + sqrt{3})^2 + sqrt{7} = 1 + (sqrt{3} + sqrt{7})^2) b. ((-2 + 7i) + 4i = -2 + (7i + 4i)) c. (sqrt{18} + 5sqrt{3}(sqrt{6} + 5)) d. ((5i cdot 2i) + 11i = 11i + (5i cdot 2i)) question 18 not yet answered marked out of 1.00 flag question identify the multiplicative inverse of the value below. (-\frac{21}{9}) select one: a. (\frac{21}{9}) b. (\frac{9}{21}) c. (-\frac{9i}{2}) d. (-\frac{9}{21})

Explanation:

Answer:

c. All complex numbers are pure imaginary numbers.
b. $(-2 + 7i) + 4i = -2 + (7i + 4i)$
d. $-\frac{9}{2i}$