What is this answer i dont know i need to acheve a grade 4 for my mathwatch test

n+7

Step-by-step explanation:

5+7=12

12+7=19

19+7=26

26+7=33

ETC...

7n-2

Step-by-step explanation:

First you need to see by how much the sequence progresses each time, and this is 7.

So you write 7n.

Next you look at the first term of the sequence, which is 5 here and you need to go from 7 to 5.

You minus 2 to go from 7 to 5, therefore the expression would be 7n-2.

(x) - (y) = (1 + 4i)

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