Andrea is designing the seating arrangement for a concert in her local park.
to give everyone a good view, each row must have four more seats than the row before it, and the first row can only have 10 seats.
andrea plan the rest of the seating by solving for how many seats are in row 20. then explain to andrea how to create an equation to predict the number of seats in any row. show your work, and use complete sentences.

see my explanation

Step-by-step explanation:

The first row must have 10 seats, and every row has 4 more than the previous row so you will get a sequence of:

10,14,18...which is a linear function because it has a constant rate of change...

ds/dr=k=4

y=4r+b and in row one we have ten seats so:

10=4(1)+b

b=6 thus the seats in any row can be expresses as:

s(r)=4r+6

So in row 20

s(20)=4(20)+6=86

the correct is answer is a 9-sided polygon!

a

step-by-step explanation:

the answer is a