What is the value of the expression below when y = 5?
4y2 – 7y - 6

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

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.