Help me with this please (2)

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

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 check if i did this right since i really want to make sure it’s correct. if you do you so much