Which relationship is NOT a fuction​

What is 1/2 x (6 x 4)+3 + 2 show your work

Which math sentence can be used to determine if the triangle is a right triangle?

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).