Cynthia said that when you multiply three negative numbers the answer will be positive. Use these numbers to answer the questions: - 8.5, - 9, - 1.7, - 6.5, 3 (a) Is Cynthia's statement always true, sometimes true, or always false? Write two equations to support your answer. (b) Pretend that you need to explain to a friend what happens when you multiply three negative numbers. (c) Cynthia changed her statement to say that when you multiply two negative numbers and a positive number the answer will be positive. Is Cynthia's new statement always true, sometimes true, or always false? Write two equations to support your answer.

Question

Mathematics

Ralph Mcbride

29 December, 15:54

Cynthia said that when you multiply three negative numbers the answer will be positive. Use these numbers to answer the questions: - 8.5, - 9, - 1.7, - 6.5, 3 (a) Is Cynthia's statement always true, sometimes true, or always false? Write two equations to support your answer. (b) Pretend that you need to explain to a friend what happens when you multiply three negative numbers. (c) Cynthia changed her statement to say that when you multiply two negative numbers and a positive number the answer will be positive. Is Cynthia's new statement always true, sometimes true, or always false? Write two equations to support your answer.

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Answers (1)

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Sophie · Answer 1

A) Never

B) - 9 x - 1.7 x - 8.5 = - 130.05

-6.5 x - 9 x - 1.7 = - 99.45

C) When you multiply 2 negative numbers the answer will always be a positive. So when you multiply that number by the third number it will end up being a positive x a negative which will always be a negative.

D) Always true

-1 x - 1 x 4 = 4

-5 x - 2 x 3 = 30