The phrases that are inequalities are:
B) -2 < 2
D) 7w > 5.6
E) f - 4 - 7 > 7 - 4 - f
<h3></h3><h3>Which of the following phrases are inequalities?</h3>
First, we define an equation as:
Where P and Q are two expressions.
On the other hand, an inequality can be:
These are inequalities because now the expressions P and Q can (and in some cases must) be different.
With that in mind, the phrases that are inequalities are:
B) -2 < 2
D) 7w > 5.6
E) f - 4 - 7 > 7 - 4 - f
As you can see, in these 3 we have the "lower than" or "larger than" symbols used, so these represent inequalities.
If you want to learn more about inequalities:
#SPJ1
Answer: C) All real values of x such that
In other words, x must be 0 or smaller.
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Explanation:
The reason why is because we must make the stuff under the square root to never be negative. We must make -2x be 0 or larger.
So,
As an example, if x = -2, then -2x = -2(-2) = 4 is positive. Applying the square root to a positive number is valid.
But if x = 5, then -2x = -2*5 = -10 is under the square root, which is not allowed.