What is the value of y=6−4x when x=2?

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Asphere has a diameter of 10 in. what is the volume of the sphere?

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).