Which of these is a correct compound sentence? * 1.Sally went to school, paid attention, and learned a lot.

2.I have a test today.

3.I studied fragments, run-ons, and complete sentences.

4.I studied hard, so I know I will do well on this test.

jml angle lkj & angle mj = lm

i believe it's a.

i'm not sure on this one, most likely correct.

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