Question

I really need help

Answer 1

Crystal is organizing the seating arrangements for a concert in her local park. The first row's seats are modeled by the function f(x) = 12. To give everyone a good view, each row must have three more seats than the row before it. The number of additional seats a row has is modeled by the function s(x) = 3(x - 1).

Answer 2

Explain to Crystal how to create an equation to predict the number of seats in any row. Describe how to determine the number of seats in the 30th row.

Answer 3

Make a series of terms, on for each row:-

x = 1 2 3

12 12 + 3(2 - 1) 12 + 3(3 - 1)

do you see the pattern here?

Answer 4

what what be the formula for the nth row in the series?

Answer 5

yes, i keep going until i hit 30 rows

Answer 6

12+3(30 + 1)

Answer 7

yes or you could use a formula to find the 30th row directly

Answer 8

right

Answer 9

quite easy really

Answer 10

nth row = 12 + 3(n - 1)

Answer 11

and then insert 30?

Answer 12

yea

Answer 13

so it should be 30 = 12+3(n-1)?

Answer 14

no you REPLACE the n by 30

30th row = 12 + 3(30 - 1)

Answer 15

ooooh okay, thanks man you have no idea how much this helps

Answer 16

yw

Answer 17

i'm a woman but thats ok!!!

Answer 18

oh sorry, well thank you madam