Answer:
You can type that info into M-a-t-h-w-a-y and they can give you a correct answer.
Step-by-step explanation:
Look it up without the dashes. this website wouldn't let me type it without for some reason. Hope this helps!
-279
a=64
d=t2-t1=57-64=-7
t50=a+49d=64+49×(-7)
=64-343
=-279
