Marcelina uses a blend of white corn and yellow corn to make tortilla chips at her restaurant She needs to buy 50 kg of corn in total for her next order. White corn costs $0.30 per kilogram, yellow corn costs $0.15 per kilogram, and she wants to spend $12 total. Here's a graph that shows a system of equations for this scenario where is the amount of white corn she buys and y is the amount of yellow corn she buys.