PLEASE HELP will give brainlist

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).

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?