Which of the following graphs corresponds to the following function?

The triangles are similar. what is the value of x? show your work.

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).

Find the interior angle of a regular polygon which has 6 sides