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Mathematics 18 Online
OpenStudy (narissa):

4. 4-d<4+d

OpenStudy (neonumbrella5115):

Do you want an answer? Or do you need help solving it?

OpenStudy (christos):

4-d<4+d weather you see constants (like 4) or uknowns (like d) to be on opposite side of the inequality and still have the same sign (in this case +) you can remove them from the inequality -d<+d

OpenStudy (christos):

So im guessing that the question was asking of wether or not the inequality holds

OpenStudy (christos):

which it does , since, -d is smaller than +d , hence -d<+d

OpenStudy (narissa):

-d<+d isnt a answer choice :/

OpenStudy (narissa):

@neonumbrella5115 can you please help??

OpenStudy (narissa):

@SolomonZelman

OpenStudy (neonumbrella5115):

So the first step would be to get the variables together right? So add d to both sides.

OpenStudy (narissa):

okay

OpenStudy (narissa):

whats the next step?

OpenStudy (neonumbrella5115):

Is the number 4.4 or just 4? When you subtract 4 or 4.4 from both sides, you'll get an answer

OpenStudy (narissa):

just 4

OpenStudy (narissa):

is the answe d>-4?

OpenStudy (narissa):

@AlexandervonHumboldt2

OpenStudy (neonumbrella5115):

When you add d to both sides, you get 4<2d+4 Then when you subtract four from each side, you get 0<2d Once you do the last step, then you're perfect!

OpenStudy (narissa):

so the answer is d>0?

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