I need help please

Next, chad created this graph with ordered pairs that show the possible ratios of the number of damage to defense cards in his deck. what error chad make?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

(60 points) explain this in detail