Determine whether the statement is true or false.If it is false,give a counterexample.?

Hey guys need up on these just remember if it is false give an counterexample.





51.) The opposite of -a is always positive.





52.) The opposite of [a] is never positive.





53.) The expression [-a] is never negative.Determine whether the statement is true or false.If it is false,give a counterexample.?
51) False, ';a'; could be a negative number.





52) True, the opposite of an absolute value is always negative and never positive.





53) True, absolute value is always positive.Determine whether the statement is true or false.If it is false,give a counterexample.?
-1 * -1 = 1


-1 * 1 = -1


1 * 1 = 1
51. True


52. True


53. False, it's already negative





Dumb, but thanks for the 2 points....
51. false. ';a'; could be a negative number. -(-a) is positive. Therefore the reverse would be negative.


52 %26amp; 53 are true.
51.true


52.true because [a] equals positive so therefore positive can't be its opposite


53.true
do your own homework.
51. False, a could be 0.





52. True, because the opposite of the absolute value of any number is negative.





53. True because the absolute value of a negative is always positive.





Yuck, Math bites.
DO YOUR OWN HOMEWORK!!!
they are all true


but 52


if those are absolute value marks


absolute values can't be negative
51. True 52. False The opposite of [a] is always positive. 53. True.

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