Can someone help me with these two questions? PIC ATTACHED. (finding min. and max. values of a function)

Question

anonymous · Answer

Where is the pic?

anonymous · Answer

attachment

anonymous · Answer

just posted it @hosttrace

anonymous · Answer

oh wait that is wrong, some might not fit the other constraints, damn

anonymous · Answer

@satellite73 wait what?

anonymous · Answer

i thought you could just check which pair gives you the biggest, but you cannot 
lets graph the inequalities with wolfram, otherwise this is a real pita

anonymous · Answer

i have no idea how to use wolfram hahaha

anonymous · Answer

give me a second

anonymous · Answer

okayy

anonymous · Answer

we need the corners of this sucker
the upper right hand corner looks like $(9,9)$

anonymous · Answer

oops forgot the link http://www.wolframalpha.com/input/?i=8x%2B2y%3E36%2C-3x%2B6y%3C27%2C-7x%2B5y%3E-18

anonymous · Answer

matter of fact, it looks like the only corner from your choices, so pick that one

anonymous · Answer

oh look, you turned in to a cartoon!

anonymous · Answer

okay haha, thank you!

anonymous · Answer

ooh i have found an even better way to cheat check this out http://www.wolframalpha.com/input/?i=+maximize+9x%2B5y+given++8x%2B2y%3E36%2C-3x%2B6y%3C27%2C-7x%2B5y%3E-18

anonymous · Answer

you can mimic that syntax to do the next one too
want to try it?

anonymous · Answer

yeah! gimmie  a sec

anonymous · Answer

for the second one my answer is A!

anonymous · Answer

i got (4,8) for the max http://www.wolframalpha.com/input/?i=++maximize+4x%2B7y+given++x%2By%3E2%2C8x-2y%3C16%2C4y%3C6x%2B8

anonymous · Answer

only choice, so yeah A

anonymous · Answer

thanks for the help!! :)

anonymous · Answer

i forking love wolfram
yw