The measure of each interior angle in a regular quadrilateral is ___°.

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 are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac