Por favor ayúdeme con esto urgente para mañana

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.

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?