7. A hotel charges a flat rate per group and an additional price per room for reserving a block of rooms. The expression 189r + 500 represents the total price, in dollars, the
hotel charges for one group renting r rooms.

How do you do this geometry problem

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

Sandy is ordering bread rolls for her party,she wants 3/5 of the rolls to be whole wheat. what other factions can represent part of the rolls that will be whole wheat? shade the models to show your work.