Find the diameter of a circle whose circumference is 18.85 m. a. 3.46 m b. 2.45 m c. 6 m d. 12 m

C

Step-by-step explanation:

the formula for calculating the circumference ( C) of a circle is

C = πd ← d is the diameter

divide both sides by π to isolate d

d = = = 6 m → C

my answer got deleted but it's a

step-by-step explanation:

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!