C A chemist has a container of 12% peroxide solution and a container of 20% peroxide solution. She needs to mix the two
solutions to create 100 mL of a 14% solution. If x represents the amount of 12% peroxide solution and y represents the
amount of 20% peroxide solution she needs, which matrix equation can determine the amount of each solution she needs
to make the 14% solution?

What is the quotient of -3/8and-1/3?

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?