Please somome help me with algebra 2 please I need help on my test

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).

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Tom drove 206 miles in 3.9 hours. estimate his average speed.