Find tan if 90° < theta < 180°, and csc theta = 5/4

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).

What’s the answer ? use the picture to see the problem

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.