Awnser !
if i have a class connect at 10: 30-11: 00 and another at 11: 30-12: 30, and i start at 9: 00 un the morning, and i have 3 classes that last about 30min-1 hour, what time do i get done?

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.