Find a+b,2a+3b, iai, and ia-bi. a[4, 1], b=[1, -2]

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.

Which point is a solution to y s 4x + 5?

Ineed me i stuck and i don’t want to get it wrong