Which expression is equivalent to |a|≤3 ?
1. a ≤ –3 or a ≥ 3
2. a ≥ –3 and a ≤ 3
3. a ≥ –3 or a ≤ 3
4. a ≤ –3 and a ≥ 3

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Explanation:

The rule is that if for some positive number k, then it can be written as the compound inequality . This is a shorthand way of writing the two inequalities combined together.

note: is the same as

From here, we replace k with 3

Therefore, turns into which breaks down further to

The keyword "and" is important as we can't pick one or the other. We must pick both and also

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.