Joel made egg sandwiches and tuna sandwiches in the ratio do 2: 3. he then made 15 tuna sandwiches and the rating changed to 1: 3. how many sandwiches did joel make in all

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.

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?

Norder to get a certain shade of blue paint, a mixer must have 5 parts white paint to 3 parts blue. if 4 gallons of paint must be mixed, how many gallons of white paint must be used?