If HJ=2x+4, JK=3x+3, and KH=22, find the lengths of HJ and JK

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).

Can someone me on this math worksheet about finding the given variable for these angles, and whether the triangles are similar. i really need these answers i’m so confused: ( !