1) -18=2-a

Please help

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

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).

Pls yall i really need the answer fr fr