5/7 divided by 3 and 1/3

For how answer my question this will be the last question can you answer in math subject

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?