I'm behind and i need this one question answered asap! graph the line y = 2x + 3

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?