Sophie exchanged 300 american dollars for 378 new zealand dollars. how many new zealand dollars will she get for 50 american dollars?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

What is the the greatest common factor ?