Makayla wants to make 200 mL of a 18% saline solution but only has access to 8% and 24% saline mixtures. Which of the following system of equations correctly describes this situation if x represents the amount of the 8% solution used, and y represents the amount of the 24% solution used? a.) 0.08 x plus 0.24 y equals 200 x plus y equals 0.18 left parenthesis 200 right parenthesis b.) 0.24 x plus 0.08 y equals 0.18 left parenthesis 200 right parenthesis x plus y equals 200 c.) 0.08 x plus 0.24 y equals 0.18 left parenthesis 200 right parenthesis x plus y equals 200 d.) 0.24 x plus 0.08 y equals 200 x plus y equals 0.18 left parenthesis 200 right parenthesis