Answer:
12 min
Step-by-step explanation:
D = 12 Miles from her house to Fixit.
Speed =Distance travelled/ Time
Time =Distance travelled/ Speed
T = D / 30 The time it took her to drive to Fixit.
T = D / 20 The time it took her to ride the bus home.
D / 30 + D / 20 = 1 hour, solve for D,
x =
f(2) = 18
Expand brackets.
Apply radical rule :
te da x<3/2 y x<2, pero la segunda solucion abarca la primera. Por lo tanto creo q seria x<2