At a candy store, erika bought 3 kilograms of cinnamon red hots and 1 kilogram of gummy bears for $21.00.
meanwhile, irene bought 3 kilograms of cinnamon red hots and 3 kilograms of gummy bears for $39.00.
what is the cost of one kilogram of each type of candy?

b=9 dollars per kilogram

c=4 dollars per kilogram.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

part a: 1.08

part b: 27.59