a: 1/20
b: -11/60
c: 11/60
d: 1/45
Hope this helps!
Answer:
common difference(d) = 11
first term (a)=11
then the nth term
=a+(n-1)d
=11+ (n-1)*11
=11+11n-11
=11n
197 = 32 + 33x
165=33x
x = 5
so she worked 5 hours
