Lucy and barbara began savings money the same week. the table below shows the models for the amount of money lucy and barbara had saved after x weeks.
lucy's savings f(x)=10x+5
barbara's savings g(x)=7.5x+25
after how many weeks will lucy and barbara have the same amount of money saved?
a)1.1 weeks
b)1.7 weeks
c)8 weeks
d)12 weeks