On a multiple-choice test over English vocabulary, Roy got 16 out of 20 correct. What percent of the problems did she miss? Round your answer to the nearest tenth of a percent, if necessary.

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

on the middle line

step-by-step explanation:

1/5=50