Answer:
-279
Step-by-step explanation:
a=64
d=t2-t1=57-64=-7
t50=a+49d=64+49×(-7)
=64-343
=-279
B :)
The first part is already solved.
<u>We got the scale factor </u>
<u>Use this to find the missing side:</u>
4 is the median to your problem