a merchant wants to mix gummy worms worth $6 per round and gummy bears worth $3 per round to make 30 pounds of mixture worth 4.20. How many pounds of each type of candy should he use?

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.