Hey there!
[tex] Remember: \\ \\ \\ +,+ = + \\ \\ -,- = + \\ \\ -,+ = - \\ \\ +,- = - [/tex]
The line ( [tex] | [/tex] ) that's surround the number [tex] 9 [/tex] in this [tex] equation [/tex] is like a [tex] multiplication [/tex] symbol
We have: [tex] negative [/tex] and [tex] positive [/tex] so, that means your result will be a [tex] negative [/tex]
We can remove: [tex] C [/tex] and [tex] D [/tex] because they are [tex] incorrect [/tex]
For [tex] B [/tex] that would be your answer if you're [tex] subtracting [/tex]
[tex] -2(9) = -18 [/tex]
So, therefore your answer would most likely be: [tex] -18 [/tex]
Good luck on your assignment and enjoy your day!
~[tex] LoveYourselfFirst:) [/tex]