When kira's father's age, a, is divided by kira's age , b, you get a quotient of 13 r1. identify one possibility for their ages.

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.