Write the equation of the mirror line for the segment with endpoints (5, 4) and (-1, -1).

Find the reflection of the point A(3, -2) through the mirror line of y = 1/2x − 1.

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.

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

The measure of an angle is 117°. what is the measure of a supplementary angle?