SPT ~ QPR. What are the reasons? ST. QR. What re the reasons?

A- SAS similarity
B- SSA similarity
C-Congruent corresponding <'s make linea parallel
D-Congruent alternative interior <'s make lines parallel

Please help me :((​

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).