Someone please help me! I've been on this question for almost 20 minutes!

it would open into a square depending on the type of envelope i’m not sure about the second part

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

hi there, i would be interested to you with your test, may you add the questions and answer options.

- : )