There are going to be presentations at a school. if 30 people can fit in a room, how many rooms are necessary if there are a total of 40 people going to the presentations? rooms

2 rooms because 40-30=10 and those 10 people still need a room

two data sets with the same median will not have the same varaibility

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!