Try it
The explicit formula for the geometric sequence -1. 1 -1,3, - 9. is f(x) = -1(-3)*-1. What is the common ratio
and recursive formula for this sequence?
3; f(x + 1) = 3(f(x))
0 -3; f(x + 1) = -3(f(x))
3; f(x + 1) = {(f(x))
0 -3; fx + 1) = { 09x))

Its B

Step-by-step explanation:

I guessed and got it right the 2nd time :)

i think it would be 42cm

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!