Question

4. In the set of real numbers the inequality •4 + 5 <0 is

verified

A. always

B. if • = -5

C. never

D. if •> -5

E. if • < - 45

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Answer 1

Step-by-step explanation:

Hey! What I don't get is "•," I think it's some variable you've assumed. Anyway, I've replaced it with x for now.

That way it becomes:

4x + 5 < 0

Subtracting 5 from both sides of the inequality

==> 4x + 5 - 5 < -5

==> 4x < - 5

dividing both sides by 4

==> x < -5/4

Okay, so this inequality is verified whenever x < -5/4.

If you think of x as "•"

Then, • < -5/4

I don't see any such options. I'm pretty confident about my answer, though.