Abdc is an isosceles trapezoid. given only the choices below, which properties would you use to prove acd ≅ bdc by sss?

31/6= 19/6 19/6 *1/7=19/42

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b

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.