Question

the theatre is remodelled and 30 new rows of seats are added. how many seats will there be in the theatre now ?​

Answer 1

ᗩᑎՏᗯᗴᖇ:-

$t1 = a = 20 \\ t2 = a + 2 = 22 \\ t3 = a + 2 + 2 = 24 \\ d = 2$

ᴛʜᴇʀᴇғᴏʀᴇ - ᴛʜᴇʀᴇ ᴀʀᴇ 30 ʀᴏᴡs

$t30 = a + 29 \: d \\ = 20 + 58 \: \\ = 78$

ᴛʜᴇʀᴇ ᴀʀᴇ 78 sᴇᴀᴛs ᴀᴛ ʟᴀsᴛ ɴᴏᴡ..

ᕼOᑭᗴ ITᘔ ᕼᗴᒪᑭՏ