In order to answer the question, you need to know what a multiple is. A multiple is a number which can be divided by the original number without a remainder. So for example multiples of 5 include: 5, 10, 15, 20, 25, etc... you are basically adding 5 each time. So in this question, you are being asked to list what the multiples of 9 are that are less than 80. You begin by listing the multiples of 9 and stop once you get to 80.
9,18, 27, 36, 45, 54, 63, 72, 81. You stop here because the last multiple of 9 that you listed is more than 80. So your answer to this question would be: 9,18, 27, 36, 45, 54, 63, 72.
The little bars on each side of the number -27 represent absolute value. This means that you must take the positive of the number inside the absolute value. In this case the positive of -27 is...
A. 27
Hope this helped!
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... because you divide the time but the distance so for this question you divide 22.5 by 5 and that's your answer. do the same for every question! hope this helps.