The third choice is very useful. It's valid because two things that are both equal to 'y' are equal to each other, and it can be easily solved to find 'x'.
Answer:
5.524 in 2 significant figures rounding the value to 2 non zero numbers.
<em>5</em><em>.</em><em>5</em><em>2</em><em>4</em><em> </em><em>=</em><em> </em><em>5</em><em>.</em><em>5</em><em> </em><em>(</em><em>2</em><em> </em><em>significant</em><em> figures</em><em>)</em>
Answer:
The equivalent expression for |b| > 2 is {b : b < -2} ∪ {b : b > 2}.
Step-by-step explanation:
The expression |x| < a is equivalent to -a < x < a and the expression |x| > a is equivalent to {x : x < -a} ∪ {x : x > a}.
This means, the set of all points that satisfy the inequality |x| < a is the set of all points between -a and a exclusive of -a and a.
The set of all points that satisfy the inequality |x| > a is the set of all points that are less than -a and the set of all points that are greater than a.
Hence, the equivalent expression for |b| > 2 is {b : b < -2} ∪ {b : b > 2}.
