What’s 15+15-10 for math quiz help before I fail pls pls help someone

20 is the answer

Now go get 100%

20

Step-by-step explanation:

15+15 is 30 then subtract 10 gives you 20

are ya tryin to ask something or is this a statement

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