What is the missing Length

Compare the cost of the bike trips from the two companies shown. for both the cost in a linear function of the number of days which statements is true

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?