In a plane, line b is parallel to line f, line f is parallel to line g, and line h is perpendicular to line b. which of the following cannot be true? a. b || g b. g || h c. b perpendicular h d. h perpendicular f

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.