Which algebraic expression is a polynomial with a degree of 5? 3x5 8x4y2 â€"" 9x3y3 â€"" 6y5 2xy4 4x2y3 â€"" 6x3y2 â€"" 7x4 8y6 y5 â€"" 5xy3 7x2y2 â€"" x3y â€"" 6x4 â€""6xy5 5x2y3 â€"" x3y2 2x2y3 â€"" 3xy5.

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!

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,