A+b : [(4+5i) + (1+5i)] . (1+i) =a+bi

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.

How is the number of vertices for a prism related to the name of the prism

Can someone me with this problem i don't understand i need