There are 9 different routese between citise A and B, and 8 different routes between cities B and C. How many different routese are there form city A to city C by way of city B socratic. org

72 routes

Step-by-step explanation:

The total number of routes from city A to C by way of city B is determined as the product of picking one out 9 routes from A to B by picking one out of 8 routes from city B to C:

There are 72 different possible routes.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!