Jill bought a lamp at a garage sale for $12. She fixed the lamp and solid it in her furniture shop for $40. What was the approximate percent markup

Reflect the point (7,0) across the y-axis

How is working backward similar to solving an equation?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?