What is the midpoint between (-4 - 2i) and ( 6 + 8i) on the complex plane?
a) -1 - 3i
eliminate
b) 1 + 3i
c) 2 + 3i
d) 2 - 3i

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!

6 equilateral triangles

the train arrives at 20: 27 hope i