Joaquin and serena are looking at the problem 3x+1>0 serena says that the inequality is always true because multiplying a number by three and then adding one to it makes the number greater than zero, is she right explain why or why not

Question

Scott

Mathematics

11 June, 12:05

Joaquin and serena are looking at the problem 3x+1>0 serena says that the inequality is always true because multiplying a number by three and then adding one to it makes the number greater than zero, is she right explain why or why not

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Answers (2)

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Taniyah Bradford · Answer 1

Serena is wrong. She has completely ignored negative numbers.

With negative numbers, it is possible to have an answer that is less than zero.

For example, x=-2

3 (-2) + 1 = - 5

which is not > than 0.

Bryant Liu · Answer 2

Unfortunately, Serena is not correct. She has apparently lost sight of

most of the world of negative numbers.

In fact, if 'x' is ANY number less than negative 1/3, then 3x+1 is less than zero.

There are a huge load of numbers that qualify.