What is the length of a side of rhombus jklm

we know that

In a Rhombus all sides are congruent

so

we have

equate MJ and JK

Solve for x

Find the length side of the rhombus

therefore

the answer is

The length side of the rhombus is

your answer would be 12

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!