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Problem

Find: $$1-2+3-4+5-6+\ldots+99-100$$

00:38

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Thomas E.

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Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 Problem 11 Problem 12 Problem 13 Problem 14 Problem 15 Problem 16 Problem 17 Problem 18 Problem 19 Problem 20 Problem 21 Problem 22 Problem 23 Problem 24 Problem 25 Problem 26 Problem 27 Problem 28 Problem 29 Problem 30 Problem 31 Problem 32 Problem 33 Problem 34 Problem 35 Problem 36 Problem 37 Problem 38 Problem 39 Problem 40 Problem 41 Problem 42 Problem 43 Problem 44 Problem 45 Problem 46 Problem 47 Problem 48 Problem 49 Problem 50 Problem 51 Problem 52 Problem 53 Problem 54 Problem 55 Problem 56 Problem 57 Problem 58 Problem 59 Problem 60 Problem 61 Problem 62 Problem 63 Problem 64 Problem 65 Problem 66 Problem 67 Problem 68 Problem 69 Problem 70 Problem 71 Problem 72 Problem 73 Problem 74 Problem 75 Problem 76 Problem 77 Problem 78 Problem 79 Problem 80 Problem 81 Problem 82 Problem 83 Problem 84 Problem 85 Problem 86 Problem 87 Problem 88 Problem 89 Problem 90 Problem 91 Problem 92 Problem 93 Problem 94 Problem 95 Problem 96 Problem 97 Problem 98 Problem 99 Problem 100 Problem 101 Problem 102 Problem 103 Problem 104 Problem 105 Problem 106 Problem 107 Problem 108 Problem 109 Problem 110 Problem 111 Problem 112 Problem 113 Problem 114 Problem 115 Problem 116

Problem 115 Hard Difficulty

Suppose $x$ is positive and $y$ is negative. Determine whether each statement is true or false.
a. $x-y>0$
b. $y-x<0$
c. $|-x|<0$
d. $-|y|<0$

Answer

a:True, b:True ,c:False , d:True

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Video Transcript

Okay. We want to determine if these four are true or false. Given the X is posted its great zero on wise negative. I less than zero. So here we've got a positive number. Take away a negative. Bogus. Be great In zero, we'll post it is great. Zero Ah nde When you take away negative Well, then it becomes a positive on two posters that together always great zero. So the first one's true. Next up, we've got a negative take away. A positive will be left in zero. Well, the negatives lesson zero on you taking away a positive. So you saw my adding on negatives you further into the natives. So Yep, that's fun. Hey, we've got the absolute value off Negative X. So the absolute value it will be left zero. So I think it would have been negative on the absolute value. Anything. It's always going to be like the positive version on it. So this is not true on now we've got the negative value off the absolute value off. Why I'm always left zero. Well, yes, it is. Because actually very wise is gonna be a positive. And then you're going to turn into negative because it's always going to be positive coming out of the absolute value on then. So you're always going to turn into a negative. So I've got three trees, have one false.

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Alan S. Tussy, R. David Gustafson

Elementary and Intermediate Algebra

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