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Mathematics 20 Online
OpenStudy (anonymous):

Did work!!!! But If you could check and see if my answers are right. Could you also show work, so I know isn't a guess.

OpenStudy (anonymous):

OpenStudy (solomonzelman):

yes correct for #1

OpenStudy (solomonzelman):

trust me I am not guessing:O

OpenStudy (anonymous):

Thanks, but can you show work pls.

OpenStudy (solomonzelman):

Ok, \(\large\color{black}{ \displaystyle 47-(-68)=47+68=115 }\)

OpenStudy (anonymous):

OpenStudy (solomonzelman):

yes you are correct on #2, as well. Should I show why?

OpenStudy (anonymous):

no its ok. the next one is how i wanted you to show work, but its ok

OpenStudy (anonymous):

OpenStudy (solomonzelman):

Yes that is right as well.

OpenStudy (solomonzelman):

(you already showed why)

OpenStudy (anonymous):

ok, let me draw out the next one

OpenStudy (anonymous):

Sorry took so long ...

OpenStudy (solomonzelman):

negative × negative = positive (you are incorrect)

OpenStudy (solomonzelman):

\(\large\color{black}{ \displaystyle (-23)\times(-24)=(-1)^2\times 23\times 24=23\times 24 }\) I am just showing that for all positive number a and b, when you say: `(-a)•(-b)`, that will be the same as `a•b`.

OpenStudy (solomonzelman):

Now, lets perform the multiplication

OpenStudy (solomonzelman):

|dw:1440471613916:dw|

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