Someone help please i will mark as brainliset. Myra combined the like terms in the algebraic expression correctly. Which statement correctly describes what Myra did?

8 x squared + 7 minus 2 x squared + x

Myra combined 8 and Negative 2 to equal 6 x squared + x + 7.

Myra combined 8 and 2 to equal 10 x squared + x + 7.

Myra combined 8 and 7 to equal 15 x squared minus 2 x squared + x.

Myra combined 8 and 1 to equal 9 x squared minus 2 x squared + 7

x=6 and x=3

beep beep imma sheep

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!

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110

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