5c^2-d^2+3 2c-4d if c= -1 and d=-4 please show how you got the answer and also I will mark Brainliest

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.

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Me i'm timed right now! a. (0,-5)b. (0,-3)c. (0,3) d. (0,5)