The dryer costs $100 - $30 = $<<100-30=70>>70.
So the washing machine and dryer cost $100 + $70 = $<<100+70=170>>170.
Hannah got $170 x 10/100 = $<<170*10/100=17>>17 discount.
Thus, Hannah paid $170 - $17 = $<<170-17=153>>153.
#### 153