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Mathematics 17 Online
OpenStudy (anonymous):

Why would this be 18? I don't understand. What is the value of |x| + y when x = –3 and y = 15? A. –18 B. –12 C. 12 D. 18

zepdrix (zepdrix):

The value of |x| when x=-3 is: \(\large\rm |-3|=3\)

OpenStudy (anonymous):

Yea i get that part but why wouldn't y=12

zepdrix (zepdrix):

? 0_o

OpenStudy (anonymous):

I did 12+3=15 why wouldn't be 12 instead of 18+3

zepdrix (zepdrix):

What is the value of \(\large\rm |\color{royalblue}{x}|+\color{orangered}{y}\) when \(\large\rm \color{royalblue}{x=-3}\) and \(\large\rm \color{orangered}{y=15}\). \[\large\rm |\color{royalblue}{-3}|+\color{orangered}{15}\]\[\large\rm 3+\color{orangered}{15}\]

zepdrix (zepdrix):

I still can't figure out where your 12 is coming from :)

OpenStudy (anonymous):

12 is one of the answers

zepdrix (zepdrix):

But why are you referring to that number at all? Just plug in the -3 and the 15.

zepdrix (zepdrix):

|-3| + 15 simplies to 3 + 15

OpenStudy (astrophysics):

Anything in the absolute value signs becomes positive, |-2|=2, |-x|=x you see?

OpenStudy (anonymous):

Ok I see where I went wrong. It is x+y not x+y=15. So 3+15 = 18. I looked at the equation wrong. Thank you,

zepdrix (zepdrix):

Oh I see :)

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