Plss give me an answer for this it is super hard​

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

X+ y = 5 ; x - y =3 solve using linear combination