19. DODECAHEDRON A dodecahedron has twelve sides numbered
1 through 12. Find the probability and describe the likelihood
of each event.
a. Rolling a number less than 9
b. rolling a multiple of 3
c. rollinh a number grrater than 6

a = 8/12 (2/3)

b = 4/12 (1/3)

c = 6/12 (1/2)

Step-by-step explanation:

a= 1-8 = 8 numbers less than 9

b= 3,6,9,12 = 4 numbers multiple of 3

c = 7-12 = 6 numbers higher than 7

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!